Question 1142939: 1) An organizational psychologist was interested in whether individuals working in different sectors of a company differed in their attitudes towards the company. The results for the three people surveyed in engineering were 10, 12, and 11; for the three in the marketing department, 6, 6, and 8; for the three in accounting, 7, 4, and 4; and for the three in production, 14, 16, and 13 (higher numbers mean more positive attitudes. Was there a significant difference in attitude toward the company among employees working in different sectors of the company at the .05 level?
(a) Use the steps of hypothesis testing.
(b) Explain your answer to someone who understands everything involved in conducting a t test for independent means, but is unfamiliar with the analysis of variance.
2) What are the approximate numbers of participants needed for each of the following planned studies to have 80% power, assuming equal numbers in the two groups and all using the .05 significance level? (Be sure to give the total number of participants needed, not just the number needed for each group.)
Expected
µ1 µ2 ơ Tails
a. 10 15 25 1
b. 10 30 25 1
c. 10 30 40 1
d. 10 15 25 2
About how many participants do you need for 80% power in each of the following planned studies, using a chi-square test of independence with p < .05?
Predicted Effect Size Design
(a)small 2 x 2
(b)meduim 2 x 2
(c)large 2 x 2
(d)small 3 x 3
(e)meduim 3 x 3
(f)large 3 x 3
Answer by solver91311(24713)   (Show Source):
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