Question 1

Which type of chart is best suited for displaying the distribution of a single quantitative variable, such as the number of iPads sold per day, as shown in the first image?

Accepted Answer

Histogram

Question 2

In the second image, which type of chart is being used to compare the frequencies of three categories?

Accepted Answer

Bar chart

Question 3

The third image shows a pie chart. If category B represents 52% of the data, what is the angle in degrees for category B in the pie chart?

Accepted Answer

$$187.2^\circ$$

Question 4

Which Excel feature must be enabled to access advanced statistical tools such as histograms and descriptive statistics, as shown in images 4-7?

Accepted Answer

Analysis ToolPak

Question 5

In the process of constructing a frequency distribution in Excel, which function is used to count the number of values falling within specified bins, as shown in image 9?

Accepted Answer

FREQUENCY

Question 6

Refer to the histogram in image 13. What is the shape of the distribution?

Accepted Answer

Symmetric

Question 7

Which chart type is most appropriate for comparing the market share of different computer brands, as shown in image 21?

Accepted Answer

Pie chart

Question 8

In the context of contingency tables (see images 27-29), what does the value in the cell at the intersection of 'Female' and 'Cash' represent?

Accepted Answer

The number of female customers who paid by cash

Question 9

Given the Super Bowl poll results in images 31-33, what type of bar chart is used to compare the interests of men and women?

Accepted Answer

Clustered bar chart

Question 10

If you want to examine the relationship between two quantitative variables, such as TV size and price, which chart should you use?

Accepted Answer

Scatter plot

Question 11

Which of the following is NOT a rule for constructing classes for grouped data in a frequency distribution?

Accepted Answer

Classes should be open-ended

Question 12

A histogram is different from a bar chart because:

Accepted Answer

Its bars touch each other, representing continuous data

Question 13

If a frequency distribution has the following relative frequencies: $$0.1, 0.2, 0.3, 0.4$$, what is the cumulative relative frequency for the third class?

Accepted Answer

$$0.1 + 0.2 + 0.3 = 0.6$$

Question 14

Which of the following best describes a Pareto chart?

Accepted Answer

A bar chart with categories in descending order and a cumulative line

Question 15

When constructing a stem-and-leaf display, what is the main advantage over a histogram?

Accepted Answer

It preserves the original data values

Question 16

Which Excel function would you use to count the number of times a specific grade appears in a list of student grades?

Accepted Answer

COUNTIF

Question 17

If you want to compare the unemployment rates of five states in 2011 and 2012, which chart is most appropriate?

Accepted Answer

Clustered bar chart

Question 18

Which of the following is a key difference between a bar chart and a histogram?

Accepted Answer

Bar charts have gaps between bars, histograms do not

Question 19

In a contingency table, what does the marginal distribution represent?

Accepted Answer

The total distribution for each variable separately

Chapter 2

Guida di studio - Domande di pratica

Study guide - Flashcard