Question 1

Which type of data is represented in the pie chart titled 'Classification of Statistics Students'?

Accepted Answer

Qualitative (categorical) data

Question 2

In the bar graph 'Number of Credit Hours Completed per Student', what type of data is being displayed?

Accepted Answer

Quantitative discrete data

Question 3

Which sampling method would be most appropriate to ensure that both part-time and full-time students are proportionally represented in a survey at De Anza College?

Accepted Answer

Stratified sampling

Question 4

If a researcher randomly selects every 10th student from a list of all students at Foothill College, which sampling method is being used?

Accepted Answer

Systematic sampling

Question 5

In the bar graph 'Ethnicity of Students', what is the relative frequency of Hispanic/Latino students at De Anza College?

Accepted Answer

$$0.171$$

Question 6

Which graph type is most appropriate for displaying the proportions of different ethnic groups when the percentages add up to more than 100%?

Accepted Answer

Bar graph

Question 7

A survey at a college finds that 61% of students are under age 25, 48.6% intend to transfer, and 40.9% are full-time. Why do these percentages add up to more than 100%?

Accepted Answer

Students can belong to more than one category

Question 8

In the pie chart comparing part-time and full-time students at De Anza College and Foothill College, which college has a higher proportion of part-time students?

Accepted Answer

Foothill College

Question 9

What is the main advantage of using a Pareto chart over a standard bar graph for displaying categorical data?

Accepted Answer

It sorts categories from largest to smallest, making interpretation easier

Question 10

In the bar graph 'Student Status', what is the total number of students at De Anza College?

Accepted Answer

$$9,200 + 13,296 = 22,496$$

Question 11

Which level of measurement is used for the data shown in the pie chart 'Classification of Statistics Students'?

Accepted Answer

Ordinal scale

Question 12

If a researcher wants to compare the cumulative relative frequency of CEO ages under 55, which graph should they use?

Accepted Answer

Graph B

Question 13

In the bar graph 'Ethnicity of Students', which ethnic group has the second highest relative frequency?

Accepted Answer

White

Question 14

What is the cumulative relative frequency for CEO ages between 40 and 54, given the frequencies: 3 (40–44), 11 (45–49), 13 (50–54), and a total of 60 CEOs?

Accepted Answer

$$\frac{3+11+13}{60} = \frac{27}{60} = 0.45$$

Question 15

Which of the following best describes the data shown in the histogram 'Number of Credit Hours Completed per Student'?

Accepted Answer

Quantitative discrete data grouped into intervals

Question 16

If a survey is conducted only among students attending a music concert, which type of sampling is being used?

Accepted Answer

Convenience sampling

Question 17

In the pie chart showing the classification of statistics students, which group is most likely to be overrepresented if the sample is taken from an introductory statistics course?

Accepted Answer

First-year

Question 18

What is the main reason for including the 'Other/Unknown' category in the ethnicity bar graph?

Accepted Answer

To ensure the percentages add up to 100%

Question 19

If a researcher wants to display the proportion of students in each classification (first-year, sophomore, junior, senior), which graph would be most appropriate?

Accepted Answer

Pie chart

Question 20

In the bar graph 'Ethnicity of Students', what is the proportion of students who are Asian?

Accepted Answer

$$0.361$$

Introduction to Statistics: Data, Sampling, and Experimental Design

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