Statistics and Probability

The number of baskets made by each of the 10 basketball players is listed below.

Given the data, select the choice that displays the correct Mean, Median, Mode.

7, 5, 12, 8, 9, 5, 20, 14, 5, 9

• Mean  9.4;  Median  8.5;  Mode 5

• Mean  9.4;  Median  8.5;  Mode 9

• Mean  9.4;  Median  8;    Mode 5

• Mean  9.4;  Median  9;    Mode 9

According to the box plot shown, what is the third quartile value?

• 70

• 80

• 90

• 100

The number of iTunes songs downloaded by 25 students in one week ranges from 15 to 55. 

The box plot depicts this data.

What percent of the students downloaded 25 or more songs?

Stephanie calculated the 5-point summary for a set of data.  

Lower Extreme (minimum)………0

Quartile 1…………………………………5

Quartile 2…………………………..……..8         

Quartile 3……………………………….13

Upper Extreme (maximum)…….20 

Based on Stephanie’s findings, calculate the Interquartile Range (IQR).

• 8

• 20

• 5

• 13

At a health club, an employee tracks the number of laps around the track that each member jogs. 

The results for five members are 15, 9, 7, 3, 12.  Use the data to make a box plot.

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What is the probability of rolling a 4 or a 5 on a number cube?

 

Ms. Sajewski surveyed her students on the number of book they read last summer. Which is NOT true?

• The mode number of books read is one
• The median number of books read is 1.5
• Ms. Sajewski surveyed 20 students
• The mean number of books read is 3.25

The graph compares Homework Time versus TV Time for a group of high school students.What is the interquartile range of homework time?

• 40 minutes
• 190 minutes
• 28 minutes
• 12 minutes

Sama tracked the hours of sleep that she got over the course of a week: 10, 9, 7, 9, 9, 7, 6    Which is a reasonable prediction of the mean number of hours of sleep that Sama gets in a night?

• 7
• 8
• 9
• 10

The stem-and-leaf plots show the scores of two classes on the Chapter 6 Test. 
Which statement about the medians is true?

• Class A and Class B share the same median
• Class A's median is 3.5 points lower than Class B's median
• Class A's median is 4.5 points lower than Class B's median
• Class A's median is 6.5 points lower than Class B's median