1.If you took the last 50 tornado seasons of the Southeast and the last 50 tornado seasons of the Midwest and ranked them according to the number of tornadoes, which statistical test would you use to test for a relationship?

A.Pearson correlation coefficient

B.Spearman correlation coefficient

C.One-sample t test

D.Matched pairs t-test

E.Chi-square test

2.The Pearson coefficient for temperature vs. cooling by perspiration [in units of W/m2] is 0.97.What does this value tell you?

A.There is a strong, negative relationship between these variables. A decrease in temperature results in increased perspiration or an increase in temperature results in decreased perspiration.

B.There is a strong, positive relationship between these variables.An increase in temperature results in decreased perspiration or a decrease in temperature results in an increase in perspiration.

C.There is a strong, positive relationship between these variables. A decrease in temperature results in decreased perspiration or an increase in temperature results in an increase in perspiration.

D.There is no relationship between these variables.A decrease in temperature results in no change in perspiration.

3.Calculate the Spearman correlation coefficient for the given data (Counties in Mississippi). What does your calculated value tell you?

County Ranking by # Tornado Deaths Ranking by # mobile homes

Newton 3 2

Jackson 4 4

Clay 2 3

Webster 1 1

Choctaw 5 5

A.0.18; there is a weak, positive relationship between tornado deaths and number of mobile homes

B.-0.58; there is a moderate, negative relationship between tornado deaths and number of mobile homes

C.0.75; there is a strong, positive relationship between tornado deaths and number of mobile homes

D.0.90; there is a strong, positive relationship between tornado deaths and number of mobile homes

4.Calculate the Pearson correlation coefficient for the given data to see if there is a relationship between spring thaw temperatures (in degrees F) and the height of the MacKenzie river (above average in cm) for the following 5 river gage stations.

Station Temp. (F) Rise in River (CM)

A 45 12

B 53 17

C 61 23

D 42 7

E 57 19

Sum XY = 4221

Sum X = 258

Sum Y = 78

A.0.596

B.0.986

C.0.721

D.-0.935

E.-0.319