AP Statistics Comparing Displays

The boxplots shown summarize two data sets, I and II. Based on the boxplots, which of the following statements about these two data sets CANNOT be justified?

• The range of data set I is equal to the range of data set II

• The interquartile range of data set I is equal to the interquartile range of data set II

• The median of data set I is less than the median of data set II

• Data set I and data set II have the same number of data points

• About 75% of the values in data set II are greater than or equal to about 50% of the values in data set I.

• I
• II
• III
• I, II, and III

The boxplots summarize two data sets, 1 and 2. Which of the following must be true? I. Class #2 contains more data than Class #1. II. The box of Class #2 contains more data than the box of Class #1. III. The data in Class #1 has a smaller range than the data in Class #2.

• I only

• I and III only

• I and II only

• I, II, and III

• III only

How is the data distributed in this histogram?

• Symmetrically

• Skewed Right

• Skewed Left

• A

• B

• C

• D

Of the following dotplots, which represents the set of data that has the greatest standard deviation?

• 
• 
• 
• 
• 

The histogram to the left shows the number of minutes needed by 45 students to finish playing a computer game. Which of the following statements is correct?

• The distribution is skewed to the right.

• The distribution is skewed to the left.

• The distribution appears to be normal.

• The distribution appears to be chi-square.

• The distribution appears to be uniform.

The histogram pictured here displays the frequencies of waiting times, in minutes, for 175 patients in a dentist's office.

Which of the following could be the median of the waiting times, in minutes?

• 2.50

• 7.25

• 12.25

• 15.00

• 17.50

• More females use social networking sites.
• In general, females use the sites more often than males.
• Approximately the same number of males and females were surveyed.
• About 43% of all students surveyed said they used social networking sites on a weekly basis.

• The slope decreased and the r² increased.
• The slope increased and the r² decreased.
• The slope decreased but r² remained the same.
• Both slope and r² remained the same.