An organizational psychologist was interested in whether individuals working in different sectors of a company differed in their attitudes toward the company. The results for the three people surveyed in development 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) sketch the distributions involved;
(c) figure the effect size for the study;
(d) explain your answer to part (a) to someone who understands everything involved in conducting a t test for independent means but is unfamiliar with the analysis of variance;
(e) test the significance of planned contrasts using the overall .05 level (with a Bonferroni correction for testing each of the six contrasts) for development versus marketing
(f) development versus accounting
(g) development versus production,
(h) marketing versus accounting
(i) marketing versus production and
(j) accounting versus production
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