Statistics Semester Review

• -0.95

• 1.05

• 0.95

• -1.05

The scatter graph shows the relationship between the age of a car and its value.

Describe the correlation shown on the diagram

• Positive

• Negative

• No Correlation

How many data points are greater than 34?

• 10

• 11

• 12

• 13

The mean life of a tire is 30,000 km. The standard deviation is 2000 km.

Then, 68% of all tires will have a life between ___________ km and __________ km.

•  28,000 km and 32,000 km.

• 24,000 km and 34,000 km.

• 26,000 km and 34,000 km.

• 27,000 km and 31,000 km.

Which dot plot has the greatest variability?

• A

• B

• C

• D

What is the population standard deviation for the data given:

5, 10, 7, 12, 0, 20, 15, 22, 8, 2

• 6.89

• 10.1

• 7.26

• 9

What is the percentile of the value 74 in the following group of 15 data values? 23, 30, 35, 55, 61, 65, 68, 69, 70, 74, 80, 85, 90, 100, 100

• 73rd

• 67th

• 75th

• 60th

Here are the weights (in pounds) of 10 puppies: 4 4 5 7 8 8 8 10 12 13 What is the percentile of a 5 pound puppy?

• 30th percentile

• 20th percentile

• 70th percentile

• 30th percentile

What type of correlation describes the following sentence:

The temperature outside and the number of cups of hot chocolate sold at a football game.

• postive

• negative

• no

In how many games did the team score more than 20 points?

• 8

• 7

• 10

• 9