Statistics Review M4

Find the median and mean of the data set below:

10, 43, 22, 29

• 25.5, 26

• 26, 25.5

• 28, 26

• 25, 28

a list has a mean of 8 and a standard deviation of 10, what is the z-score if a pond has dropped in depth to -2

True or False: the outlier affects the mean more then the median

In a circle graph, how do you find the angle after you divide the percent of the section

• you subtract the divided sum by with the protractor

• you add the number with the protractor

• you draw a line

• you multiply and throw on the circle

In a box and whiskers plot, what percent of the data is above the first quartile?

• 25%

• 50%

• 75%

• 100%

Two data sets are shown below.

Set 1: 54, 68, 68, 70, 73, 79, 84, 90, 96, 100

 

Set 2: 66, 68, 68, 70, 72, 80, 85, 98, 99, 100

Which statement is true about the data sets?

• The median of Set 1 is greater than the median of Set 2

• The median of Set 1 is less than the median of Set 2.

• The mean of Set 1 is greater than the mean of Set 2.

• The mean of Set 1 is less than the mean of Set 2.

Given the data set below:

15, 56, 58, 60, 63, 75, 80, 80, 85

How does the outlier affect the distribution of the data? 

• The outlier skews the distribution to the left.

• The outlier skews the distribution to the right.

• The outlier makes the distribution more symmetrical.

• The outlier has no effect on the distribution.

Box plots for four competing brick manufacturers are shown below.

A contractor needs to buy bricks that are each as close to 2.5 inches high as possible. Which manufacturer would be the contractor’s best choice?

• Adam’s Bricks

• Bob’s Bricks

• Camille's Bricks

• Daniel's Bricks

A department store mails a customer satisfaction survey to people who make credit card purchases at the store. This month, 45,000 people made credit card purchases. Surveys are mailed to 1000 of these people, chosen at random, and 137 people return the survey form. Identify the population and the sample.

• P: 45,000 people who made credit card purchases.

  S: 137 returned surveys.

• P: 1,000 people that made credit card purchases who received a survey

  S: 137 returned surveys.

• P: 45,000 people who made credit card purchases.

  S: 1,000 people that made credit card purchases who received a survey

• P: All people who that have made credit card purchases.

  S: 1,000 people that made credit card purchases who received a survey

What percent of the data is in each section of a box and whiskers plot?

• 20%

• 42%

• 25%

• 32%