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Questions 36-39: Six numbers are selected at random from a random number generator and entered into...

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Statistics

Questions 36-39: Six numbers are selected at random froma random number generator and entered into each of four rows. Thesummary statistics are presented in the chart below.

Mean

SD  

Row 1

5.8 

0.78

Row 2

3.6 

0.23

Row 3

5.5 

0.32

Row 4

4.0 

0.59



Assume the populations are normal with equal variances. Itis of interest to test the following:
Ho: μ1 = μ2 =μ3 = μ4

36. What are the degrees of freedom for the teststatistic?: *

(A) 3 and 18

(B) 3 and 20

(C) 4 and 22

(D) 4 and 24

37. What type of test should be used here?:*

(A) F test

(B) T test

(C) Chi-square test

(D) Kolmogorov-Smirnov test

38. What is the critical value at the 0.05 significancelevel?: *

(A) 3.1

(B) 2.7

(C) 2.1

(D) 4.9

39. What is the correct decision?: *

(A) Reject the null, because the test statistic is larger thanthe critical value.

(B) Don’t reject the null, because the test statistic is smallerthan the critical value.

(C) Reject the null, because the test statistic is smaller thanthe critical value.

(D) Don’t reject the null, because the test statistic is largerthan the critical value.

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