In: Statistics and Probability
Questions 36-39: Six numbers are selected at random from
a random number generator and entered into...
Questions 36-39: Six numbers are selected at random from
a random number generator and entered into each of four rows. The
summary 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. It
is of interest to test the following:
Ho: μ1 = μ2 =
μ3 = μ4
36. What are the degrees of freedom for the test
statistic?: *
|
(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 significance
level?: *
|
(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 than
the critical value.
|
(B) Don’t reject the null, because the test statistic is smaller
than the critical value.
|
(C) Reject the null, because the test statistic is smaller than
the critical value.
|
(D) Don’t reject the null, because the test statistic is larger
than the critical value.
|
|