Statistics

The free-throw percentages for 15 players on a basketball team are shown. Which histogram could represent the data?

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The histogram shows the scores of students on an English test. Approximately what percent of the students scored above a 74?

• 93%

• 80%

• 54%

• 7%

Two students' test grades are recorded below:

Seth: {95, 94, 89, 90, 91, 96, 97, 93}

Nicole: {71, 73, 71, 72, 98, 95, 86, 79}

Which of the following statements is true?

• Seth had a higher standard deviation by about 8.2.

• Nicole had a higher standard deviation by about 8.2

• Seth had a higher standard deviation by about 12.5.

• Nicole had a higher standard deviation by about 7.7.

The data sets below represent the results of surveys conducted with ten high school students to determine the number of hours per week they spend studying for their classes. Which data set has the greatest interquartile range?

Algebra: {3, 0, 8, 7, 4, 1, 9, 7, 4, 8}

Chemistry: {5, 7, 3, 2, 8, 1, 2, 9, 11, 6}

English: {2, 4, 0, 9, 1, 2, 6, 3, 10, 2}

US History: {9, 1, 5, 2, 0, 0, 4, 2, 7, 3}

• Algebra

• Chemistry

• English

• US History

The data represents the number of minutes Jake and Asia spent doing chores each day for a week. Which statement is true about the data?

Jake: 80, 85, 90, 90, 90, 95, 98

Asia: 75, 80, 80, 90, 92, 94, 95

• The median number of minutes for Jake is higher than the median number of minutes for Asia.

• The mean number of minutes for Asia is higher than the mean number of minutes for Jake.

• The mean number of minutes for Jake and Asia are equal, but the median number of minutes are different.

• The median number of minutes for Jake and Asia are equal, but the mean number of minutes are different.

The table shows the total number of home runs hit is a high school baseball league each day over the course of a four-week time period. What is the mean number of home runs hit over this period of time?

• 4.5

• 4

• 4.9

• 5.2

The box-and-whisker plots show a summary of the test results earned by students in Mr. Rafiq's classes. Which box-and-whisker plot(s) represent a class in which more than half of the students scored 78 or greater? Select all that apply.

• Plot 1

• Plot 2

• Plot 3

• None of these

What is the difference between the histograms shown here?

• the maximum number of tickets sold

• the minimum number of tickets sold

• the median number of tickets sold

• the mode number of tickets sold

The box-and-whisker plots show the distribution of the heights, in inches, of the members of two basketball teams. Which statement is true? Select all that apply.

• The median height of Team A is equal to the median height of Team B.

• The shortest player on Team A is 2 inches taller that the shortest player on Team B.

• The range of the heights of Team A is equal to the range of the heights of Team B.

• The tallest player on Team A is 2 inches shorter than the tallest player on Team B.

The histogram shows the ages of the members of a community gym. How will the mean age of members at the community gym change if the outlier in the data shown is removed?

• The mean age of members will increase.

• The mean age of members will decrease.

• The mean age of members will not change, since outlier does not affect the mean.

• The mean age of members will not change, since there is no outlier in this data set.