Statistics

A group of 4 friends likes to bowl together, and each friend keeps track of his all-time highest score in a single game. Their high scores are all between 180 and 220, except for Adam, whose high score 250. Adam then bowls a great game and has a new high score of 290.

How will increasing Adam’s high score affect the mean and

median?

• Both the mean and median will increase.

• The median will increase, and the mean will stay the same.

• The mean will increase, and the median will stay the same.

• The mean will increase, and the median will decrease.

Which data set could be represented by the box plot shown above?

• 25,

  28, 28, 29, 30, 34, 35, 37, 37, 38

• 25,

  28, 29, 29, 30, 34, 35, 35, 37, 38

• 25, 28, 29, 29, 32, 34, 35, 36, 37, 38

• 25, 28, 29, 29, 30, 34, 35, 35, 37, 40

What is the shape of the distribution shown above?

• The distribution is skewed to the left

• The distribution is approximately symmetrical.

• The distribution is skewed to the right.

Suzanne owns a small business that employs 6 people. The top sales person in her company makes $100,000 per year, and the other 5 employees make between $40,000 and $50,000 per year.

Suzanne decides to let her top sales person go and keep the other 5 employees.

How will removing the top sales person’s salary affect the median and the mean?

• The mean will decrease and the median will stay the same.

• The median will decrease and the mean will stay the same.

• Both the mean and the median will decrease, but the median will decrease more than the mean.

• Both the mean and the median will decrease, but the mean will decrease more than the median.

A sample of potato chip bags has a mean weight of 16 ounces and standard deviation of 0.7 ounces. What is the range of weight of potato chip bags one standard deviation from the mean?

• 15.3 - 16.7 ounces

• 9 - 23 ounces

• 16.7 - 17.4 ounces

How many employees make between $45 and $55 per hour?

• 2

• 5

• 7

• 8

How many employees make less than $45 per hour?

• 3

• 4

• 8

• 10

What is the total number of employees?

• 5

• 6

• 15

• 13

What is the median of the data

• 0.6

• 0.7

• 0.8

• 7

What is the maximum of the data?

• 0.8

• 8

• 1

• 10