Question 1

Refer to the first image (circle with red and blue people). In statistics, what do the red figures outside the blue circle most likely represent?

Accepted Answer

A population

Question 2

The second image shows a flower with petals of different colors. If a survey asks people to name their favorite color, what type of data is being collected?

Accepted Answer

Qualitative

Question 3

The third image is an eye. If a study records the eye color of each participant, what is the level of measurement for this data?

Accepted Answer

Nominal

Question 4

The fourth image is 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 randomly select 4 people from this group, what is this process called?

Accepted Answer

Simple random sampling

Question 6

The sixth image is a clock. If you record the time (in minutes) it takes for each student to finish a test, what type of quantitative data is this?

Accepted Answer

Continuous

Question 7

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

Accepted Answer

Interval

Question 8

The eighth image is a bar graph. If the x-axis represents star ratings (1 to 5) for a restaurant and the y-axis represents the number of customers, what is the level of measurement for the x-axis?

Accepted Answer

Ordinal

Question 9

Suppose you use the process shown in the first image (selecting a subset from a larger group) to estimate the average height of all students in a university. What is the average height calculated from the subset called?

Accepted Answer

A statistic

Question 10

If you use the process in the fifth image (randomly selecting people) but instead select every second person in a line, what sampling method are you using?

Accepted Answer

Systematic sampling

Question 11

If you divide a population into groups based on a characteristic (such as gender, as shown in the later images), and then randomly select some people from each group, what sampling method is this?

Accepted Answer

Stratified sampling

Question 12

If you randomly select one entire group (such as a class or team, as shown in the colored group images) and survey everyone in that group, what sampling method is this?

Accepted Answer

Cluster sampling

Question 13

If you record the favorite menu item of each customer at a restaurant, what is the level of measurement for this data?

Accepted Answer

Nominal

Question 14

If you record the number of people in each group shown in the images, what type of data are you collecting?

Accepted Answer

Quantitative, discrete

Question 15

If you use a random number generator to select people from the group in the fifth image, what is the main advantage of this sampling method?

Accepted Answer

Each individual has an equal chance of being selected

Question 16

If you record the time shown on the clock in the sixth image for each student finishing a race, which level of measurement does this data represent?

Accepted Answer

Ratio

Introductory Statistics: Foundations and Data Collection

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