Question 1

Refer to the first image (a large group with a smaller group inside). In statistics, what do the red figures in the large circle and the blue figures in the smaller circle most likely represent?

Accepted Answer

Red = Population, Blue = Sample

Question 2

Which of the following best describes the data represented by the second image (a flower with different colored petals)?

Accepted Answer

Qualitative (Categorical)

Question 3

The third image shows an eye. If a survey records the eye color of each participant, what type of data is being collected?

Accepted Answer

Qualitative (Categorical)

Question 4

The fourth image shows a die. If you record the result of each roll, what type of data are you collecting?

Accepted Answer

Quantitative, Discrete

Question 5

The fifth image shows a group of people. If you count the number of people present, what type of data is this?

Accepted Answer

Quantitative, Discrete

Question 6

The sixth image shows a clock. If you record the time it takes for a runner to finish a race, what type of data is this?

Accepted Answer

Quantitative, Continuous

Question 7

The seventh image shows a thermometer. If you record the temperature in degrees Celsius, what is the level of measurement?

Accepted Answer

Interval

Question 8

The eighth image shows a bar graph. If the y-axis represents the number of customers and the x-axis represents the number of stars in a restaurant review, what is the level of measurement for the x-axis?

Accepted Answer

Ordinal

Question 9

A researcher surveys every 5th person entering a store. Which sampling method is being used?

Accepted Answer

Systematic Sampling

Question 10

A school wants to survey students about cafeteria food. They randomly select two classes from each grade and survey all students in those classes. What sampling method is this?

Accepted Answer

Cluster Sampling

Question 11

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

Accepted Answer

Ratio

Question 12

A survey asks participants to rate their satisfaction on a scale from 1 to 5. What is the level of measurement?

Accepted Answer

Ordinal

Question 13

A researcher divides a population into males and females, then randomly selects 10 from each group. What sampling method is this?

Accepted Answer

Stratified Sampling

Question 14

A company wants to test a new product. They randomly assign half of their stores to sell the product and compare sales to stores that do not sell it. What type of study is this?

Accepted Answer

Experiment

Question 15

A survey finds that 52% of a random sample of 200 college students prefer online classes. Is this value a parameter or a statistic?

Accepted Answer

Statistic

Question 16

Which of the following is NOT an example of quantitative data?

Accepted Answer

The favorite color of survey respondents

Question 17

A researcher records the years of birth for a group of participants (e.g., 1990, 1985, 2001). What is the level of measurement?

Accepted Answer

Interval

Question 18

A quality control manager selects every 12th cookie from a production line for testing. What sampling method is this?

Accepted Answer

Systematic Sampling

Question 19

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

Accepted Answer

Stratified Sampling

Question 20

A student claims that water at 80°F is twice as hot as water at 40°F. Why is this calculation incorrect?

Accepted Answer

Temperature in Fahrenheit is an interval level of measurement, so ratios are meaningless

Introduction to Statistics: Key Concepts and Foundations

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