Title: ESTADISTICA
Course: 2025 Probabilidad y Estadística

Feedback shared by this category's questions, if right: Su respuesta es correcta.
Feedback shared by this category's questions, if partly right: Su respuesta es parcialmente correcta.
Feedback shared by this category's questions, if wrong: Su respuesta es incorrecta.

Q: Select the type of variable that corresponds
- Number of classrooms in a school | Quantitative discrete
- Number of students | Quantitative discrete
- Number of pens in a pencil bag | Quantitative discrete
- Colors of the uniform | Qualitative
- Type of food | Qualitative
- Genre of books | Qualitative
- The tax you pay in a store | Quantitative continuous
- The weight of 3 boxes of potatoes | Quantitative continuous
- The quantity of water in a tank | Quantitative continuous
- The exact time of the winner in car race | Quantitative continuous

Q: The quantity of cars in a parking lot is a Quantitative discrete variable
- Verdadero
- Falso
A: Falso

Q: The number of siblings in a family is a qualitative variable
- Verdadero
- Falso
A: Falso

Q: The score in a football game is a:
- quantitative discrete variable
- quantitative continuous variable
- qualitative variable
A: quantitative discrete variable

Q: The quantity of red cars in a parking lot is a Quantitative discrete variable
- Verdadero
- Falso
A: Verdadero

Q: Select the correct definition for each concept
- Are the values or characteristics that can be observed, counted or measured, of each member of a population or of a sample | Data
- Is based on collecting data by applying surveys or other techniques | Descriptive statistics
- Is a property of study subject, that can have distinct values. | Variable
- Any subset or sub collection of the population | Sample
- Describe a numeric characteristic. | Quantitative variable
- Consist of attributes, labels, or other non-numerical characteristics | Qualitative variable
- The set of techniques to select the elements that will be part of the sample | Sampling technique
- The scale is continuous, those become from a measurement process that can get any value into a certain range. | Quantitative continuous variables
- Are the ones that assume certain values after counted | Quantitative discrete variables
- Any specific collection of objects of interest. | Population
Also offered: Statistics

Q: To create an statistic analysis, your must follow some action in certain order. Statistics is the practice or science of[...] and [...] data in large quantities to [...] and [...] in order to [...]the results of data.
A: collecting data; organizing; present; analyze; interpreting or explaining

Q: Select the area where statistics is applied
- 8 out of 10 children suffer from childhood obesity | Nutrition
- The graduation rate for students attending public universities | Education
- Over 3.8 billion people use the internet today | Technology
- Every sixth dead in the world is due to cancer | Health
- The Mexican peso fell against us dollar on Tuesday | Economy
Also offered: Schools; Money

Q: Select the type of variable:

Number of countries in Asia
- Qualitative variable
- Quantitative discrete
- Quantitative continuous
A: Quantitative discrete

Q: Select the correct type of variable:

What is your favorite color?
- Qualitative
- Quantitative discrete
- Quantitative continuous
A: Qualitative

Q: Select the corresponding variable to:

The average of the height of the students of sixth grade
- Qualitative
- Quantitative discrete
- Quantitative continuous
A: Quantitative continuous

Q: Select the corresponding type of variable of:

Women Perfumes
- Qualitative
- Quantitative discrete
- Quantitative continuous
A: Qualitative

Q: Select the type of variable of:

The record time of a track race
- Qualitative
- Quantitative discrete
- Quantitative continuous
A: Quantitative continuous

Q: Select the correct type of variable of:

Do you like to go to the movies?
- Qualitative
- Quantitative discrete
- Quantitative continuous
A: Qualitative

Q: Which type of variable does the following sentence refer to?

Quantity in litters of water needed to take a shower
- Quantitative continuous
- Quantitative discrete
- Qualitative
A: Quantitative continuous

Q: An educational researcher wants to evaluate the effectiveness of a new method for teaching deaf students to read. Achievement at the end of a teaching period is measured by the student's performance on a reading test.

Which is the population of interest in this experiment?
- Hearing impaired students
- The family of the students
- All 5 year olds
A: Hearing impaired students

Q: An educational researcher wants to evaluate the effectiveness of a new method for teaching deaf students to read. Achievement at the end of a teaching period is measured by the student's performance on a reading test.

What is the variable to study? and What type of variable is that?
- Reading test, QC
- The students, C
- New method, C
A: Reading test, QC

Q: A quality control engineer is curious about the thickness of paint on a car at her factory. She randomly selects 30 points on the car and measures the paint thickness at each of those points.

Identify the population of interest and sample on this setting.
- The population is every possible point on the car, the sample is the 30 selected points
- The population is every car at the factory, the sample is the 1 car she is curious about
- The population is every car at the factory, the sample is the 30 selected point
A: The population is every possible point on the car, the sample is the 30 selected points

Q: Lucio wants to know whether the food he serves in his restaurant is within a safe range of temperatures. He randomly selects 70 entrees and measures their temperatures just before he serves them to his customers.

Identify the population of interest and the sample of the setting.
- The population is all of the entrees Lucio serves, the sample is the 70 selected entrees.
- The population is the 70 selected entrees, the sample is the entrees that are a safe temperature.
- The population is all of the hot entered Lucio serves, the sample is the entrees that are a safe temperature
A: The population is all of the entrees Lucio serves, the sample is the 70 selected entrees.

Q: A principal wants to conduct a survey to assess the academic level of the school, and improve the infrastructure of the building. If the population of the school is 500 students on 1^st semester, 600 on 3^rd semester and 450 on 5^th
- Stratified or cluster random samples
- systematic random sample
- simple random sample and systematic
A: Stratified or cluster random samples

Q: The most common financial problem in the country is tax evasion. To check that taxpayers are up to date on their payments, the government decided to take a national sample.
- Cluster random sample
- Stratified random sample
- Simple random sample
- Systematic random sample
A: Cluster random sample

Q: A company studies the possibility of opening new supermarkets in some area of the city. Within the market research process, a survey of potential clients in the study area should be carried out.
- Simple random sample
- Cluster random sample
- Stratified random sample
- Systematic random sample
A: Simple random sample

Q: The production manager of a factory wants to know if the products meet the standard established requirements. He decided to take a sample of 100 products out of a total of 2000 items produced a day. To check every product costs a lot of many and takes a lot of time, Which is the best option he has?
- Systematic random sample
- Simple random sample
- Cluster or systematic random sample
- Stratified random sample
A: Cluster or systematic random sample

Q: In order to find out the people opinion about the nursing service in a hospital, they wanted to apply a survey. It takes time and money to make a census, so they want to take a sample. What sampling technique do you suggest?
- Simple or stratified random sample
- Cluster or systematic random sample
- Stratified random sample
- Cluster random sample
- Simple random sample
A: Simple or stratified random sample

Q: Select the ones that are Bad sampling techniques
- Simple random sample and Convenience
- convenience and voluntary response
- Stratified sample and voluntary response
- Systematic and stratified sample
A: convenience and voluntary response

Q: In a laboratory in Mexico the employees had to answer a survey about Japanese language
- Nonresponse error
- Cultural error
- Interpretation error
A: Cultural error
Partly right: Nonresponse error (90%)

Q: Some of the questions of a survey are:

1. What do you think about the future elections in México?
2. Do you know if spiders like to eat insects?

What is the type of error you'll get?
- Transition error
- Answer choice error
- Culture error
- Nonresponse error
- Interpretation error
A: Transition error

Q: Select the type of error that the following question is included in a survey about diet:
Do you include on your diet the citrullus lanatus?
- Assume knowledge error
- Transition error
- Nonresponse error
- Interpretation error
- Cultural error
A: Assume knowledge error

Q: Survey question:

Do you know the health benefits of the citrus aurantium?
- Assume knowledge error
- Interpretation error
- Cultural error
- Nonresponse error
- Transition error
A: Assume knowledge error

Q: Select the sample technique that applies in the next situation:

A truck manufacturer selects 3 trucks at random from each of 6 models for safety testing.
- Simple random sample
- Stratified random sample
- Cluster random sample
- systematic random sample
A: Stratified random sample

Q: Select the correct sample technique:

In a music school are going to make a festival, and they need to get ideas from the musicians, the principal decided to select a small group of students of each group: guitar, violin, piano, saxophone, and trumpet.
- Simple random sample
- Stratified random sample
- Cluster random sample
- Systematic random sample
A: Stratified random sample

Q: Select the correct sampling technique:

In a neighborhood decide to create a 10 people committee, writing the number of each house in small papers and making a raffle to select them.
- Simple random sample
- Stratified random sample
- Cluster sample random
- Systematic random sample
A: Simple random sample

Q: Select the correct sample technique

The manager of a Movie theater wants to make a statistical study about the preference on the candy store, so he decide to make the surveys on the first function on Saturday.
- Simple random sample
- Stratified random sample
- Cluster sample random
- Systematic random sample
A: Cluster sample random

Q: Select the corresponding sample:

A restaurant leaves comment cards on every table and encourages customers to participate in a brief survey to learn about their overall experience.
- Stratified random sample
- Convenience sample
- Voluntary response
- Simple random sample
- Cluster random sample
A: Voluntary response

Q: This diagram is recommended to represent the percentage of qualitative data.
- Circular diagram
- Bars chart
- Histogram
- Ogive
- Frequency polygon
A: Circular diagram

Q: Is the display that indicates the frequency of specified ranges of continuous data values on a graph in the form of adjacent bars.
- Histogram
- Ogive
- Frequency polygon
- Circular diagram
- Bars chart
A: Histogram

Q: Select the corresponding chart to represent the percentage of the age of 75 students of 7th grade.
- Frequency polygon
- Histogram
- Ogive
- Bars chart
- Circular diagram
A: Frequency polygon

Q: The disadvantage of this type of survey is limited to sampling and respondent availability, but it has the advantage that is low cost and real time access.
- Online
- Telephonic
- One to one
- Paper
A: Online

Q: It has a good response rate, and the attitude of the interviewers can be observed, but needs a los of people to conduct the interview and is expensive to hired too many people.
- One to one
- Telephonic
- Online
- Paper
A: One to one

Q: According to the following Bars diagram, which are the absolute frequency values that correspond to each category?

[Image]
- 2, 3, 4, 7, 3, 5
- 3, 2, 4, 7, 5, 3
- 3, 4, 5, 6, 7, 9
- 2, 3, 4, 8, 4, 5
A: 2, 3, 4, 7, 3, 5

Q: According to the following Bars diagram, which are the angles values that correspond to each category?

[Image]
- 30, 45, 60, 105, 45, 75
- 2.31, 3.47, 4.63, 8.10, 3.47, 5.79
- 35, 40, 65, 100, 43, 77
- 83, 125, 166, 29, 125, 20
A: 30, 45, 60, 105, 45, 75

Q: During the exams, the students tend to stay awake late. The time of how many hours they sleep are represented in the following histogram:

[Image]
- The total number of students who answered is 25 and most of them tend to sleep almost 4 hours, but there are two students that sleep only two and a half hours.
- The total of students who answered is 25 and there are seven students that sleep almost 4 hours and two that stayed awaken five hours.
- The total of students who answered is 10 and there are seven students that sleep almost 4 hours and two that stayed awaken little bit more than seven hours.
A: The total number of students who answered is 25 and most of them tend to sleep almost 4 hours, but there are two students that sleep only two and a half hours.

Q: The following question is included In a survey about diet, what type of error will occur?

TAccording to the benefits of the “Citrullus lanatus”, do you include it on your diet?
- Assume knowledge error
- Transition error
- Cultural error
- Answer choice error
A: Assume knowledge error

Q: A study was carried out to determine the factors that provide heat to the houses, and thereby reduce the consumption of electricity, gas and other fuel. The results are:

[Image]

Select the diagram that correspond to this results.
- [Image]
- [Image]
- [Image]
A: [Image]

Q: Interpret the data shown in the following ogive, and select the corresponding data table.

[Image]
- [Image]
- [Image]
- [Image]
A: [Image]

Q: Selecciona la opción que no es variable cuantitativa
- La estatura de 100 personas
- El número de carros en un estacionamiento
- Cuántos pares de zapatos hay en un closet
- Marcas de celulares
A: Marcas de celulares

Q: Selecciona qué tipo de variable es: "El peso exacto de 30 cajas llenas de naranjas"
- Cualitativa
- Cuantitativa discreta
- Cuantitativa continua
A: Cuantitativa continua

Q: Selecciona el tipo de variable de cada opción
- Número de escuelas en Cd Juárez | Cuantitativa discreta
- Tipos de carreras en una universidad | Cualitativa
- Mi nombre es James Bond | Cualitativa
- Cantidad del IVA a pagarde en la cuenta del super | Cuantitativa discreta
Also offered: Cuantitativa continúa

Q: Que tipo de variable es el tiempo exacto que tardas en tomar una ducha?
- Cualitativa
- Cuantitativa Continua
- Cuantitativa Discreta
A: Cuantitativa Continua

Q: Selecciona la variable que no es cualitativa
- Sabor favorito de nieve
- Número de integrantes de una familia
- Raza de tu mascota
- Restaurantes de Cd. Juárez
A: Número de integrantes de una familia

Q: "El peso que marca una báscula de la mercancía de un camión" es una variable:
- Cualitativa
- Cuantitativa discreta
- Cuantitativa continua
A: Cuantitativa continua

Q: Qué tipo de muestreo es cuando el maestro hace una rifa para seleccionar 3 estudiantes de un grupo?
- Muestreo aleatorio simple
- Muestreo estratificado
- Muestreo sistemático
- Muestreo por conglomerados
A: Muestreo aleatorio simple

Q: En un club deportivo se va a celebrar el 10o. aniversario, y los organizadores del evento pidieron la opinion a 3 integrantes de cada deporte: 3 de natación, 3 de atletismo, 3 de basketball, 3 de box, etc. ¿Que tipo de muestreo aplicaron?
- Muestreo aleatorio simple
- Muestreo estratificado
- Muestreo sistematico
- Muestreo por conglomerados
A: Muestreo estratificado

Q: En una fábrica de cepillos de dientes se desea hacer una revisión de calidad, diariamente hay una producción de 10500 dispositivos y se eligen solamente 500 de cada lote. Que tipo de muestreo aplica?
- Muestreo Aleatorio simple
- Muestreo estratificado
- Muestreo por conglomerados
- Muestreo sistemático
A: Muestreo sistemático

Q: Es la diferencia entre el límite inferior y límite superior de una clase, en una tabla de distribución de frecuencias
- Rango
- Marca de clase
- Ancho de clase
A: Ancho de clase

Q: Es el resultado de restar el Valor máximo menos el valor mínimo de un conjunto de datos
- Rango
- Ancho de clase
- Marca de clase
A: Rango

Q: En la siguiente tabla se muestran datos cualitativos, cuál es la moda?

[Image]
- blue
- purple y white
- blue, purple y white
- yellow
A: blue

Q: Selecciona los valores correspondientes a la marca de clase de la siguiente distribución de frecuencias.

[Image]
- 388.6, 705.98, 1023.3, 1340.62, 1657.94, 1975.26
- 194.33, 352.99, 511.65,670.31, 828.97, 987.63
- 2.37, 1.57, 1.36, 1.26, 1.21, 1.17
A: 194.33, 352.99, 511.65,670.31, 828.97, 987.63

Q: Calcula el ancho de clase de un grupo de datos con un rango de 9.5 si se usan 5 clases
- 1
- 1.9
- 2
A: 2

Q: Frecuencia necesaria para calcular la mediana de una tabla de distribución de datos agrupados
- Frecuencia absoluta
- Frecuencia relativa
- Frecuencia acumulada
A: Frecuencia acumulada

Q: Medida de dispersión más importante. Mide la dispersión de los datos respecto al valor medio de la distribución, el resultado se expresa elevado al cuadrado.
- Varianza
- Desviación estándar
- Sesgo
A: Varianza

Q: Es negativo cuando el valor de la media de una distribución de datos es menor al valor de la mediana
- Sesgo
- Varianza
- Desviación estándar
A: Sesgo

Q: Encuentra la media de la siguiente muestra de datos:

45 | 63 | 21 | 85 | 55 | 43 | 69
- 54.42
- 53.5
- 55.1
A: 54.42

Q: Determina el valor de la mediana de la siguiente muestra de datos: -5, 2, 3, 0, -4, 4, 3, 5, 6, 1
- 1.5
- 2.5
- 3
A: 2.5

Q: La varianza de una muestra de 8 datos es 47.71, encuentra el valor de la desviación estándar
- 2276.24
- 6381.68
- 23.85
- 6.91
A: 2276.24

Q: Indica que tipo de moda tiene la siguiente muestra de datos: 2, 6, 8, 2, 6, 7, 9, 8, 3, 10, 5, 14, 4
- No hay moda
- bimodal
- mutltimodal
A: mutltimodal

Q: Selecciona las medidas de tendencia central
- sesgo, varianza, desviación estándar
- rango, media, mediana, moda
- Tabla de distribución de frecuencias
A: rango, media, mediana, moda

Q: Selecciona la opción que no es variable cuantitativa
- La estatura de 100 personas
- El número de carros en un estacionamiento
- Cuántos pares de zapatos hay en un closet
- Sabores de nieve
A: Sabores de nieve

Q: Selecciona qué tipo de variable es: "El peso exacto de costales de papas"
- Cualitativa
- Cuantitativa discreta
- Cuantitativa continua
A: Cuantitativa continua

Q: Que tipo de variable es el tiempo exacto que tarda en hervir un litro de agua?
- Cualitativa
- Cuantitativa Continua
- Cuantitativa Discreta
A: Cuantitativa Continua

Q: "El peso que marca una báscula en una carnicería" es una variable:
- Cualitativa
- Cuantitativa discreta
- Cuantitativa continua
A: Cuantitativa continua

Q: Encuentra la mediana de la siguiente muestra de datos:

45 | 87 | 55 | 63 | 21 | 85 | 43 | 56
- 55.5
- 56.87
- 53
A: 55.5

Q: Is the measure with the highest absolute frequency in a Frequency distribution table.
- estimated median
- estimated mean
- estimated mode
- standard deviation
- variance
A: estimated mode

Q: Measure that Is the average of the summatory of the product of each absolute frequency times the midpoint of each class (fi*xi) in a frequency distribution table.
- estimated mean
- estimated median
- estimated mode
- standard deviation
- variance
A: estimated mean

Q: The value of the mean and the median defines if the minimum of data is located right or left
- absolute freq.
- cumulative freq.
- relative freq.
- positive or negative skew
A: positive or negative skew

Q: Frequency used to calculate the estimated median
- absolute freq.
- cumulative freq.
- relative freq.
- skew
A: cumulative freq.

Q: If the value of the mean is less than the median in a normal distribution, that means that the skew is:
- positive
- symmetrical
- negative
A: negative

Q: Having the following sample of data

1 | -5 | 13 | 4 | -8 | -4 | 5 | 6

calculate the mean, median and mode
- 2.5, 1.5, mode 4
- 1.5, 3, mode 4
- 1.5, 2.5, no mode
- 1.5, 2.5, mode 5
A: 1.5, 2.5, no mode

Q: Find the type of mode included in the following set of data.

58 | 81 | 71 | 45 | 62 | 61 | 92 | 72 | 55 | 60 | 92 | 49 | 55 | 73 | 95 | 72
- one mode
- bimodal
- multimodal
A: multimodal

Q: If the variance of an 8 data sample (not grouped data) is equal to 47.71, what is the value of the standard deviation?
- 6. 91
- 2276.14
- 6.381.68
- 23.85
A: 6. 91

Q: For the following group of data, 4, 5, 5, 7, 8 and 13, select the true statement:
- There is no mode
- The median is greater than the mean
- The mean is 7
- The mode is greater than the mean
A: The mean is 7

Q: On the following chart, you can see the age that some amount of people had the first time they got a job.

How many people answered?
- 135
- 17
- 55
- 32
A: 55

Q: What is the value of the mode?
- 16
- 17
- 32
- 37
A: 17

Q: According to the following distribution Table, calculate the value of the estimated mean and estimated median

[Image]
- 4.65, 4.3
- 5.30, 4.8
- 4.80, 62
- 4.52, 4.54
A: 4.52, 4.54