1.You have a 2 by 2 Chi-squared contingency table.The observed frequencies are (top left 12, top right 24, bottom left 20, bottom right 14).What is the expected value that goes in the top left cell?

A.6.34

B.16.46

C.32

D.36

2.You are conducting a two sample t-test looking at average rainfall in the summer for two locations:one is urban and the other is rural.Youwant to see if there is a statistically significant difference in the rainfall of theselocationsdue to the Urban Heat Island.Both Samples use data fromthe months of May through August (including May and August). What are the degrees of freedom for this test?

A.6

B.8

C.7

D.we cannot do the test because the samples have the same number of months

3.You are testing whether there are significant differences between the shear values of two tornado samples (sample 1 and sample 2).Sample 1 has 15 tornadoes and sample 2 has 17 tornadoes.What is your critical t-value for this test at 1% significance?

A.2.042

B.2.457

C.2.750

D2.957

4.The winter rainfall average for MSU campus is 22.65 inches. In the winter of 2017, campus saw 25.91 inches.Was that winter's precipitation significantly higher than the average? Run a one-sample t-test to see.

Other info:Sample SD = 1.2, N = 17; t-critical = 2.583

A.calculated t = 3.26; yes, winter 2017 rainfall was significantly higher

B.calculated t = -1.82; no, winter 2017 rainfall was not significantly higher

C.calculated t = -5.25; no, winter 2017 rainfall was not significantly higher

D.calculated t = 10.87; yes, winter 2017 rainfall was significantly higher

5.The average high temperature in Ames, Iowa in July is 87.8F [pop mean]. The average high on July 4th is 87.5F at this location. Run a one-sample z-test to see if average high temps on July 4th are significantly different from the rest of the month. Additional data: pop SD = 1.25, n = 100, z critical = 2.58.

A.calculated z = -0.253; no avg high temperature is not significantly different on July 4th

B.calculated z = -2.4; no avg high temperature is not significantly different on July 4th

C.calculated z = 5.36; yes avg high temperature is significantly different on July 4th

D.calculated z = 8.14; yes avg high temperature is significantly different on July 4th

6.Find Y given the following: x= 0; Y = 41.32-2x

A.41.32

B.39.32

C.43.32

D.this is impossible to calculate because X equals zero

7.Find Y given the following: x= -4; Y = 21.57-7x

A.-2.08

B.-6.43

C.31.57

D.49.57