Question 1

A researcher collects the heights of all students in a university. Which term best describes this data set?

Accepted Answer

Population

Question 2

A survey of 50 randomly selected patients at a hospital finds an average recovery time of 7 days. Is this value a parameter or a statistic?

Accepted Answer

Statistic

Question 3

Which of the following is an example of qualitative data?

Accepted Answer

The favorite color of each participant

Question 4

A company records the number of defective products produced each day. What type of quantitative data is this?

Accepted Answer

Quantitative; Discrete

Question 5

Which level of measurement allows for meaningful differences but not meaningful ratios, and does not have a true zero?

Accepted Answer

Interval

Question 6

A scientist records the weights of newborns in a hospital. What is the level of measurement for this data?

Accepted Answer

Ratio

Question 7

A student records the temperature of water at multiple points during an experiment and claims the water is twice as hot at 80°F compared to 40°F. Why is this calculation incorrect?

Accepted Answer

Temperature in Fahrenheit does not have a true zero, so ratios are meaningless

Question 8

Which level of measurement could describe both quantitative and qualitative data?

Accepted Answer

Ordinal

Question 9

A hospital records patient satisfaction on a scale from 1 to 5. What is the level of measurement?

Accepted Answer

Ordinal

Question 10

A store manager wants to test whether increasing store hours increases profits. They randomly select half of their locations to stay open later and compare profits. What type of study is this, and can causation be assumed?

Accepted Answer

Experiment; causation can be assumed

Question 11

A bakery tests every 12th cookie produced for quality. What sampling method is being used?

Accepted Answer

Systematic sampling

Question 12

A university surveys 50 random undergraduates and 50 random graduate students. What sampling method is this?

Accepted Answer

Stratified sampling

Question 13

A quality control manager selects three random cases of units at the end of the day to test for defects. What sampling method is this?

Accepted Answer

Cluster sampling

Question 14

A store surveys all customers entering the shop on a randomly chosen day about their preferences. Is this a simple random sample? Is it representative?

Accepted Answer

No; No

Question 15

A professor wants feedback from her statistics course and decides to survey 5 random students out of 20. Which process would generate a simple random sample?

Accepted Answer

Assigning each student a number and using a random number generator to select 5

Question 16

A quality control manager selects every tenth unit produced to inspect for defects. What sampling method is this?

Accepted Answer

Systematic sampling

Question 17

A quality control manager uses a random number generator to select 100 units out of 1500 produced that day. What sampling method is this?

Accepted Answer

Simple random sampling

Question 18

A manager takes 10 random units from each of 10 machines to test for defects. What sampling method is this?

Accepted Answer

Stratified sampling

Question 19

Which of the following is NOT quantitative data?

Accepted Answer

The brands of smartphones owned by students

Question 20

Which of the following is a discrete quantitative set of data?

Accepted Answer

The number of goals scored by a soccer team in a match

Chapter 1: Data Collection – Fundamentals of Statistics

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드