Review for ALG. LT 1.2 Quiz

The box-and-whisker plots below show the scores earned by 6^th and 7^th graders on a year-end reading test.  

Which statement is best supported by the box-and-whisker plots?

• The range of the 7^th grade scores is greater than the range of the 6^th grade scores.

• The median of the 6^th grade scores is greater than the median of the 7^th grade scores.

• The mean of the 7^th grade scores is less than the mean of the 6^th grade scores.

• The number of 6^th graders who took the test is greater than the number of 7^th graders who took the test.

Given the following distributions, which has the smallest IQR?

• Red

• Purple

• Black

Given the following distributions, which has the highest median?

• Red

• Purple

• Black

Given the following distributions, which is symmetric?

• Red

• Purple

• Black

Given the following distributions, which is skewed to the right?

• Red

• Purple

• Black

Given a set of symmetric data, which of the following is an appropriate measure of the center?

• Mean

• Median

• Mode

Given a set of skewed data, which is an appropriate measure of center?

• Mean

• Median

• Mode

Gabriella’s quiz grades are shown below.
88, 92, 92, 96, 98
Gabriella scored a 20 on her sixth quiz. What effect does this score have?

• The low score causes the median to increase.
• The low score causes the median to decrease.
• The low score causes the mean to increase.
• The low score causes the mean to decrease.

Which dot plot has the greatest variability?

• A
• B
• C
• D

What measure of center was most affected by the outlier?

• mean
• median
• mode
• range