Role of Stats/Data Types/Sampling Methods

Question 1

Descriptive statistics is about: (multiple correct answers)

Answer 1

Summarizing graphically and numerically

Question 2

The branch of statistics that focuses on inferring conclusions is called ________________ Statistics

Answer 2

Inferential

Question 3

Regression analysis is used to predict a response based on a predictor or a set of predictors (T or F)

Answer 3

True

Question 4

The first step in the engineering method is to?

Answer 4

Formulate problem statement

Question 5

Variability is unavoidable in data and statistics helps in understanding and describing it (T or F)

Answer 5

True

Question 6

We call a process that may generate different outcomes for the same input a __________ process

Answer 6

Random

Question 7

Up until the 20th century, the common perspective in science was?

Answer 7

Everything is governed by a set of laws

Question 8

Which science helps in understanding randomness?

Answer 8

Probability

Question 9

Probability is not needed to understand statistics (T or F)

Answer 9

False

Question 10

In this class, we will study both probability and statistics (T or F)?

Answer 10

True

Question 11

Nominal data cannot be ordered (T or F)

Answer 11

True

Question 12

Nominal and ordinal data cannot be used in calculations without preprocessing (e.g., coding a movie rating response to numbers Excellent = 5) (T of F)

Answer 12

True

Question 13

A teacher ranks students in a class based on their performance in a quiz, with 1st place being the highest score and 10th place being the lowest.
What level of measurement is used to rank the students?

Answer 13

Ordinal

Question 14

A researcher records the gender of participants in a study. What level of measurement is used to categorize gender?

Answer 14

Nominal

Question 15

A temperature reading shows that it is 30°C in City A and 40°C in City B.
What level of measurement does the temperature represent?

Answer 15

Interval

Question 16

The weights of different athletes are measured in kilograms.
What level of measurement does the weight represent?

Answer 16

Ratio

Question 17

A poll categorizes respondents based on their preferred type of cuisine: Italian, Mexican, Chinese, or Indian.

Answer 17

Nominal

Question 18

A calendar records the year of various historical events, such as the signing of the Declaration of Independence in 1776.
What level of measurement does the year represent?

Answer 18

Interval

Question 19

The time it takes for runners to complete a marathon is measured in hours and minutes.
What level of measurement is used for the time recorded?

Answer 19

Ratio

Question 20

A survey asks participants to rate their satisfaction with a service on a scale from 1 (Very Dissatisfied) to 5 (Very Satisfied).
What level of measurement is used for this rating scale?

Answer 20

Ordinal

Question 21

A researcher wants to study the income levels of residents in a city. They divide the city into three income groups (low, middle, high) and randomly select equal proportions of participants from each group. What sampling method is the researcher using?

a) Simple Random Sampling
b) Systematic Sampling
c) Stratified Sampling
d) Clustering Sampling

Answer 21

C

Question 22

In a study on consumer habits, a researcher sends surveys to their friends and family. What kind of sampling method is being employed?

a) Convenience Sampling
b) Simple Random Sampling
c) Stratified Sampling
d) Systematic Sampling

Answer 22

A

Question 23

A public health official conducts a survey of physical activity levels by randomly selecting the first person, then every 10th person on a city list of residents. Which sampling method is being used?

a) Simple Random Sampling
b) Systematic Sampling
c) Stratified Sampling
d) Clustering Sampling

Answer 23

B

Question 24

A market researcher selects three neighborhood clusters (out of 20 neighborhoods) randomly within a city and surveys every resident in those clusters to understand shopping preferences. What sampling method does this represent?

a) Clustering Sampling
b) Systematic Sampling
c) Stratified Sampling
d) Convenience Sampling

Answer 24

A

Question 25

An economist studies household spending by randomly selecting households from a phone directory, ensuring the same proportion of participants from different regions of the state. What sampling method is reflected here? a) Stratified Sampling b) Simple Random Sampling c) Convenience Sampling d) Clustering Sampling

Answer 25

A

Question 26

A researcher is surveying opinions about local services and collects responses from individuals during a local community event, where attendees are invited to participate. Which sampling method is being used? a) Stratified Sampling b) Convenience Sampling c) Simple Random Sampling d) Systematic Sampling

Answer 26

B

Question 27

In a nationwide study about education levels, an education ministry randomly selects schools across all states and surveys every student in those schools. What sampling method is being used? a) Stratified Sampling b) Systematic Sampling c) Convenience Sampling d) Clustering Sampling

Answer 27

D

Question 28

A researcher wants to know the leisure activities of teenagers across a country and randomly selects individuals from a list of all registered teenagers. Which sampling method is being used? a) Clustering Sampling b) Simple Random Sampling c) Systematic Sampling d) Stratified Sampling

Answer 28

B

Question 29

A sociologist wishes to examine the impact of social media on different age groups. They collect data from people they meet at a café every Saturday. What type of sampling method is being used? a) Convenience Sampling b) Simple Random Sampling c) Systematic Sampling d) Stratified Sampling

Answer 29

A

Question 30

A government agency studies housing conditions and divides the population into different housing types (apartment, single-family, multi-family). They randomly select participants from each type in equal proportions. Which sampling method is being used? a) Stratified Sampling b) Simple Random Sampling c) Clustering Sampling d) Convenience Sampling

Answer 30

A