Basic Statistics Review

Seth said that 17 was the number that showed the difference between the lowest and highest numbers in a data set.  Which term would define Seth's number?

• mean
• median
• mode
• range

Jamal said that 41 was the number in a data set that was listed the most.  Which term would define Jamal's number?

• mean
• median
• mode
• range

What is the mean of the heart rates? (Round to the nearest whole number if needed.)

• 83

• 84

• 85

• 86

Study the data set shown. 
15, 14, 19, 16, 22, 20, 17, 20, 29, 21, 18
Which statement is true about this set of data?

• The range is 3
• The range is 20
• The median is 18.5
• The median is 19

Mr. Brown made a dot plot of the scores on his most recent test. James was absent on the day of the test. When he returned, he took the test and earned a 95. How will James' test score affect the median of the class?

• The median will double

• The median will increase

• The median will not be affected.

• The median will decrease.

• The median plant height is greater than the mode of the plant heights.

• The median plant height is less than the range of the plant heights

• The mode of the plant heights is greater than the range of the plant heights.

• The median plant height is greater than the range of the plant heights

Tony's teacher lets students pick whether to use the median, mean, or mode as their final grade.  Tony's grades are listed below.
38, 90, 95, 80, 75, 90
Which statement is true?

• Tony's median score will give him the highest grade?
• Tony's mode score will give him the highest grade?
• Tony's median and mode score give him the same grade.
• Tony's median and mean score give him the same grade.

Which is the correct data set for the dot plot?

• 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

• 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 6, 6, 6, 8, 8, 9

• 0, 1, 2, 3, 4, 5, 6, 8, 9

A local hospital collected data on the ages of its volunteers. The data is displayed in the histogram. 
Which of the following statements best describes the data in the histogram?

• The ages of the volunteers are clustered from 18 years to 41 years with no outliers.
• The ages of the volunteers are clustered from 22 years to 25 years with outliers from 38 years to 41 years.
• The ages of the volunteers are clustered from 18 years to 29 years with outliers from 38 years to 41 years.
• The ages of the volunteers are clustered from 18 years to 25 years with outliers from 26 years to 41 years.

The graph shows the results of a survey of 100 students.
How many of the students in the survey watched more than 8 hours of television?

• 66
• 88
• 33
• 100