EDA 1

Question 1

The subset of the population selected for study is called:
A. Parameter
B. Sample
C. Statistic
D. Variable

Answer 1

Sample

Question 2

. If a researcher studies all employees of a company, they are studying the:
A. Sample
B. Population
C. Statistic
D. Parameter

Answer 2

Population

Question 3

Which of the following is NOT an example of descriptive statistics?
A. Mean test score of students
B. Bar graph of ages
C. Pie chart of favorite colors
D. Predicting the outcome of an election

Answer 3

Predicting the outcome of an election

Question 4

Which of the following is an example of inferential statistics?
A. Drawing a histogram
B. Computing the average age of a sample
C. Estimating the average age of the entire population from a sample
D. Listing the number of males and females in a group

Answer 4

Estimating the average age of the entire population from a sample

Question 5

In statistics, the symbol “n” usually represents:
A. Population size
B. Sample size
C. Parameter value
D. Variable

Answer 5

Sample size

Question 6

Which of the following sets is infinite in nature?
A. A class of 30 students
B. All teachers in a school
C. The set of all stars in the universe
D. All books in a library

Answer 6

The set of all stars in the universe

Question 7

Which of the following best illustrates inferential statistics?
A. The average height of 50 students is 160 cm
B. Predicting that the average height of all students in the school is 160 cm based on 50 students
C. Drawing a bar graph of student heights
D. Listing student IDs

Answer 7

Predicting that the average height of all students in the school is 160 cm based on 50 students

Question 8

A complete set of all items under investigation is called:
A. Sample
C. Variable
B. Population
D. Statistic

Answer 8

Population

Question 9

198. Which of the following is a primary goal of inferential statistics?
     A. Collecting raw data
     B. Organizing tables
     C. Making decisions and drawing conclusions about a population
     D. Drawing pie charts

Answer 9

Making decisions and drawing conclusions about a population

Question 10

A company wants to know the average salary of its employees. It randomly checks the salaries of 100 employees and finds an average of $40,000. This average is a:
A. Parameter
C. Variable
B. Statistic
D. Population

Answer 10

Statistic

Question 11

A government agency publishes the unemployment rate of the entire country. This unemployment rate is a:
A. Parameter
B. Statistic
C. Sample
D. Variable

Answer 11

Parameter

Question 12

A school principal surveys 50 students about cafeteria food satisfaction. The percentage satisfied is an example of:
A. Parameter
B. Statistic
C. Population
D. Variable

Answer 12

Statistic

Question 13

A marketing firm predicts that 65% of all customers will buy a product based on a survey of 500 customers. This prediction is an example of:
A. Descriptive statistics
B. Inferential statistics
C. Parameter estimation only
D. Population analysis

Answer 13

Inferential statistics

Question 14

Which of the following tools is commonly used in descriptive statistics?
A. Hypothesis testing
B. Regression analysis
C. Tables, charts, and graphs
D. Confidence intervals

Answer 14

Tables, charts, and graphs

Question 15

Which of the following tools is commonly used in inferential statistics?
A. Pie charts
B. Frequency tables
C. Hypothesis testing and regression
D. Bar graphs

Answer 15

Hypothesis testing and regression

Question 16

The mean, median, and mode are examples of tools used in:
A. Descriptive statistics
B. Inferential statistics
C. Predictive statistics
D. Sampling design

Answer 16

Descriptive statistics

Question 17

Which tool would be most suitable for testing whether a new drug is more effective than the existing one?
A. Pie chart
C. Hypothesis testing
B. Histogram
D. Frequency table

Answer 17

Hypothesis testing

Question 18

A boxplot is an example of a tool used in:
A. Descriptive statistics
B. Inferential statistics
C. Regression analysis
D. Hypothesis testing

Answer 18

Descriptive statistics

Question 19

Which tool is most appropriate for estimating population parameters from a sample?
A. Graphs and charts
B. Confidence intervals
C. Frequency distribution
D. Boxplot

Answer 19

Confidence intervals

Question 20

A teacher computes the average score of her class and displays it in a bar graph. This is an example of
A. Descriptive statistics
B. Inferential statistics
C. Regression
D. Probability

Answer 20

Descriptive statistics

Question 21

A govemment agency reports that the average household incorne is P30,000 based on a survey. The P30,000 is obtained using:
tial
A. Descriptive statistics
B. Inferential statistics
C. Regression analysis
D. Data visualization

Answer 21

Descriptive statistics

Question 22

An engineer uses regression analysis to forecast future energy demand. This is an application of:
A. Descriptive statistics
B. Inferential statistics
C. Graphical tools
D. Frequency analysis

Answer 22

Inferential statistics

Question 23

A company wants to know if there is a significant difference in sales before and after a new advertisement campaign. The appropriate tool is:
his
A. Pie chart
B. Mean calculation
C. Hypothesis testing
D. Histogram

Answer 23

Hypothesis testing

Question 24

A researcher presents survey results in the form of pie charts and frequency tables. This is an example of:
A. Descriptive statistics
B. Inferential statistics
C. Regression analysis
D. Correlation

Answer 24

Descriptive statistics

Question 25

A hospital administrator uses a histogram to show the distribution of patient ages. This is an example of: A. Descriptive statistics B. Inferential statistics C. Predictive statistics D. Data sampling

Answer 25

Descriptive statistics

Question 26

An economist uses a confidence interval to estimate the true average income of all citizens from a sample. This is an application of: A. Descriptive statistics B. Inferential statistics C. Frequency distribution D. Graphical summary

Answer 26

Inferential statistics

Question 27

A quality control officer tests a sample of 100 light bulbs to determine if the defect rate is within acceptable limits. This is an example of: A. Descriptive statistics C. Frequency table analysis B. Inferential statistics D. Pie chart summary

Answer 27

Inferential statistics

Question 28

Which of the following is an example of an observation? A. Income of an employee B. One particular employee C. A group of employees D. The average income of employees

Answer 28

One particular employee

Question 29

Which of the following is an example of a variable? A. Salary of an employee B. A specific employee C. A collection of incomes D. A complete survey data set

Answer 29

Salary of an employee

Question 30

Which of the following is an example of a data set? A. One person's height B. Age of a student C. Heights of all students in a class. D. A single exam score

Answer 30

Heights of all students in a class

Question 31

Which classification applies to a study measuring both age and salary of employees? A. Univariate data set B. Bivariate data set C. Multivariate data set D. None of the above

Answer 31

Bivariate data set

Question 32

A researcher records the ages of 50 students. This study produces a: A. Univariate data set B. Bivariate data set C. Multivariate data set D. Observation set

Answer 32

Univariate data set

Question 33

A study records age, weight, and blood pressure of patients. This study is: A. Univariate B. Bivariate C. Multivariate D. Observation-based only

Answer 33

Multivariate

Question 34

In a study of 200 households, the monthly Income of each household is recorded. Each household is an: 24 A. Variable B. Observation C. Data set D. Parameter

Answer 34

Observation

Question 35

In the above problem, monthly income is the: A. Observation B. Variable C. Data set D. Statistic

Answer 35

Variable

Question 36

A teacher records the exam scores of all 40 students in her class. The collection of scores is called a: A. Variable B. Observation C. Data set D. Parameter

Answer 36

Data set

Question 37

Which of the following is also called qualitative data? A. Numerical data B. Categorical data C. Continuous data D. Discrete data

Answer 37

Categorical data

Question 38

Which of the following is also called quantitative data? A. Categorical data B. Numerical data C. Binary data D. Coding data

Answer 38

Numerical data

Question 39

Which type of data is described by words rather than numbers? A. Categorical data B. Numerical data C. Continuous data D. Discrete data

Answer 39

Categorical data

Question 40

The process of assigning numbers to categorical variables for analysis is called: A. Classification B. Quantification C. Coding D. Counting

Answer 40

Coding

Question 41

A categorical variable that has only two values is called a: A. Continuous variable B. Discrete variable C. Binary variable D. Interval variable

Answer 41

Binary variable

Question 42

Numerical data that arises from counting and produces a finite number of possible values is called: A. Continuous data C. Categorical data B. Discrete data D. Binary data

Answer 42

Discrete data

Question 43

Numerical data that can take any value within an interval is called: A. Discrete data B. Categorical data C. Continuous data D. Binary data

Answer 43

Continuous data

Question 44

The number of patients in a hospital is an example of: A. Discrete data B. Continuous data C. Categorical data D. Binary data

Answer 44

Discrete data

Question 45

The weight of a student is an example of: A. Discrete data B. Continuous data C. Categorical data D. Binary data

Answer 45

Continuous data

Question 46

Which of the following is NOT an example of categorical data? A. Payment method (cash, check, credit card) B. Type of car (SUV, sedan, truck) C. Age of a person D. Gender (male/female)

Answer 46

Age of a person

Question 47

A survey records the mode of payment: cash, check, or credit card. The type of data collected is: A. Categorical data B. Numerical data C. Continuous data D. Discrete data

Answer 47

Categorical data

Question 48

A researcher records the blood type (A, B, AB, O) of 200 students. This data is: A. Categorical B. Continuous C. Discrete D. Numerical

Answer 48

Categorical

Question 49

The daily temperature measured in degrees Celsius is classified as: A. Discrete B. Continuous C. Binary D. Categorical

Answer 49

Continuous

Question 50

The number of REE board passers in April 2025 is an example of: A. Discrete data B. Continuous data C. Categorical data D. Binary data

Answer 50

Discrete data

Question 51

Gender (male/female) is an example of: A. Continuous data B. Discrete data C. Binary categorical data D. Numerical data

Answer 51

Binary categorical data

Question 52

A company records the employee ID numbers of its workers. The type of data is: A. Categorical B. Continuous C. Discrete D. Interval

Answer 52

Categorical

Question 53

A nurse records the height of patients in centimeters. This data is: A. Discrete B. Continuous C. Categorical D. Binary

Answer 53

Continuous

Question 54

The number of cars passing through a tollgate in an hour is: A. Discrete data B. Continuous data C. Categorical data D. Binary data

Answer 54

Discrete data

Question 55

The marital status of employees (single, married, divorced) is an example of: A. Categorical data B. Discrete data C. Continuous data D. Binary numerical data

Answer 55

Categorical data

Question 56

The time taken by athletes to finish a marathon is an example of: A. Discrete B. Continuous C. Categorical D. Binary

Answer 56

Continuous

Question 57

Which of the following best describes time series data? A. Data collected from different individuals at one point in time B. Data collected across different geographic regions at the same time C. Data collected at successive, equally spaced points in time D. Data describing categories such as gender or occupation

Answer 57

Data collected at successive, equally spaced points in time

Question 58

A company records its sales revenue every month for five years. This is an example of: A. Cross-sectional data B. Time series data C. Categorical data D. Discrete data

Answer 58

Time series data

Question 59

Which of the following is an example of cross-sectional data? A. Daily stock market prices for the past year B. Income levels of 500 households in 2025 C. Temperature measured hourly over a week D. Number of patients admitted to a hospital each day in January

Answer 59

Income levels of 500 households in 2025

Question 60

Which of the following variables is most likely to be studied using time series data? A. Annual GDP of a country from 2010-2025 B. Test scores of students in a single examination C. Survey results from employees in a company in 2024 D. Population census taken once in a given year

Answer 60

Annual GDP of a country from 2010-2025

Question 61

In a cross-sectional dataset, the observations typically vary across: A. Time only B. Units (persons, firms, or regions) at the same time C. Time and units simultaneously D. None of the above

Answer 61

Units (persons, firms, or regions) at the same time

Question 62

Suppose you survey 1,000 firms about their production output in 2024. This type of dataset is: A. Time series B. Continuous data C. Cross-sectional D. Discrete data

Answer 62

Cross-sectional

Question 63

If you collected data on the monthly rainfall in Manila from 2010 to 2020, what type of data would it be? A. Cross-sectional B. Time series C. Categorical D. Qualitative

Answer 63

Time series

Question 64

A professor collects test scores of all his students in a midterm exam in March 2025. The dataset is: A. Time series B. Cross-sectional C. Continuous D. Categorical

Answer 64

Cross-sectional

Question 65

The number of siblings each student has is measured at: A. Interval B. Ordinal C. Nominal D. Ratio

Answer 65

Ratio

Question 66

A survey asks participants to rate satisfaction on a scale of 1- 5. This is: A. Interval B. Ordinal C. Ratio D. Nominal

Answer 66

Ordinal

Question 67

The years when Olympic Games were held (2000, 2004, 2008, etc.) represent: A. Ratio B. Interval C. Nominal D. Ordinal

Answer 67

Interval

Question 68

Monthly income of employees (P10,000, P15,000, P20,000) is measured A. Interval B. Ordinal C. Ratio D. Nominal

Answer 68

Ratio

Question 69

The finishing position of runners in a marathon (1st, 2nd, 3rd, etc.) is measured at: A. Ratio B. Ordinal C. Interval D. Nominal

Answer 69

Ordinal

Question 70

A teacher records students' test scores out of 100 points. This data is: A. Ratio C. Nominal B. Interval D. Ordinal

Answer 70

Ratio

Question 71

Which of the following is an example of a census? A. Surveying 200 students from a university B. Counting every resident in a country during a national population survey C. Interviewing 50 employees in a company D. Studying a random group of households

Answer 71

Counting every resident in a country during a national population survey

Question 72

261. If a university gathers data on all enrolled students to measure satisfaction, this is: A. Sample survey B. Experiment C. Census D. Interval data

Answer 72

Census

Question 73

The population mean is denoted by: A. x̄ B. s C. μ D. p

Answer 73

μ

Question 74

The sample mean is denoted by Α. μ B. x̄ С. п D. σ

Answer 74

x̄

Question 74

Dividing the population into subgroups (e.g., by age or gender) and sampling from each is: A. Cluster sampling B. Stratified sampling C. Convenience sampling D. Systematic sampling

Answer 74

Stratified sampling

Question 75

Selecting entire geographical regions (e.g., cities, zip codes) for sampling is: A. Cluster sample B. Stratified sample C. Judgment sample D. Focus group

Answer 75

Cluster sample

Question 76

A bank selects every 10th branch for a survey. This is: A. Simple random sampling B. Systematic sampling C. Cluster sampling D. Stratified sampling

Answer 76

Systematic sampling

Question 77

A hospital selects 50 patients from each department (cardiology, pediatrics, surgery). This is: A. Cluster sampling B. Convenience sampling C. Stratified sampling D. Systematic sampling

Answer 77

Stratified sampling

Question 78

A hospital selects 50 patients from each department (cardiology, pediatrics, surgery). This is: A. Cluster sampling B. Convenience sampling C. Stratified sampling D. Systematic sampling

Answer 78

Stratified sampling

Question 79

A company divides employees by office location and randomly selects 2 offices, then surveys all employees in those offices. This is: A. Stratified sampling B. Cluster sampling C. Judgment sampling D. Simple random sampling

Answer 79

Cluster sampling

Question 80

A political analyst interviews 20 "typical voters" chosen based on his expertise. This is: A. Stratified sample B. Simple random sample C. Judgment sample D. Cluster sample

Answer 80

Judgment sample

Question 81

A professor uses random numbers to pick 30 students from the university roster. This is: A. Simple random sample B. Systematic sample C. Convenience sample D. Cluster sample

Answer 81

Simple random sample