According to a survey by CCH Inc., an Illinois based consulting firm specializing in human resource management, US companies granted an average of 6.9 employee sick days during the past year (source: oregonlive.com). You take a random sample of 36 local companies and find the average number of sick days granted by the companies in the sample was 7.21 days. Is this sufficient sample evidence to make the case that that average number of sick days granted by local companies is different from the 6.9 days average reported by CCH? Use a significance level of 5% and a population standard deviation of 1.27 days.
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