One Variable and Two Variable Statistics

Which club has the smaller spread, less variation?

• Cruisers

• Car Hops

• Skewed Left
• Skewed Right
• Uniform
• Symmetric

Find the median of these numbers:
4, 2, 7, 4, 3

• 2

• 5

• 7

• 4

How many of the students had an ACT composite score of exactly 25?

• Cannot be determined

• 6

• 7

• 9

The mean of this data set is 17.8. What would happen to the mean if 40 was added to the data set?

• The mean would not change

• The mean would go up

• The mean would go down

Identify the outlier for the given data, using the formula.

23, 34, 27, 7, 30, 26, 28, 31, 34

• 7

• 23

• 31

• 34

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.

Describe the type of correlation in this scatter plot.

• Positive

• Negative

• No correlation

• Very strong

Estimating a value inside a set of data is...

• Dependent variable

• Independent variable

• Interpolation

• Extrapolation

Estimating a value outside a set of data is...

• Dependent variable

• Independent variable

• Interpolation

• Extrapolation