85% 6 04 PM QUESTION 19 A hypothesis test produces atstatistic oft. 2.14. If the

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85% 6 04 PM QUESTION 19 A hypothesis test produces atstatistic oft. 2.14. If the researcher is using a two-tailed test with a a .05, how large does the sample have to be in order to reject the null hypothesis? a. at least n m 13 b at least n 16 O c, at least n a 15 d, at least n a 14 1 points QUESTION 20 The results of a hypothesis test are reported as follows: t(8) p .05 Based on this report, what was the decision and how big was the sample? a. The null hypothesis was rejected using a sample of n 19. b The null hypothesis was not rejected using a sample of n 18. c. The null hypothesis was not rejected using a sample of 18. d The null hypothesis was rejected using a sample of n 18 1 points save Answer QUESTION 21 A sample 25 scores is obtained from a population with m 80. Which of the following sets of sample statistics is most likely to reject the null hypothesis? a. M 85 with s2.10 O b M 90 with s2.10 C. M 85 with s2 100 d M 90 with s2 100 1 points Save Answer QUESTION 22 A hypothesis test produces 2.00 for a sample of n a 16 scores. What is the value of re? b, 4/19 d 4/20

Explanation / Answer

Solution:-
19) option C. at least n=15
Explation:- looking at t-table, at 15 degrees of freedom, critical value for a=.05 is 2.131 (and for 14 deg freedom, it is 2.145). So would reject null for 15 deg. freedom, so sample size would have to be at least 16 (since a test would have 16-1=15 deg. freedom).

21) option b. M=90 with S^2=10

22) option b. 4/19

8) option a. d=0.60

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