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According to a report issued by the management consulting firm McKinsey & Company, 20% of all companies require genetic or family medical history information from employees or job applicants. A random sample of 1500 companies was obtained, and 345 said they require this information from employees or job applicants.

a. Identify p0 and n, and compute p^.

b. Check the nonskewness criterion.

c. Is there any evidence to suggest the true proportion of companies that require this information is greater than 0.20? Use a = 0.01.

d. Compute the p value associated with this hypothesis test.

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