# Null and Alternative Hypothesis for ABC

1) The average salary of managers in the advertising industry is $180,000 per year. Suppose we would like to take a sample of managers at a new company ABC, to see whether the mean annual salary is different from that of the industry. State the null and alternative hypotheses.

2) Suppose a sample of 40 managers at ABC showed a sample mean annual salary of $170,000. Assume a population standard deviation of $30,000. With = .05 as the value of significance, what is your conclusion?

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1) Answer:

Null hypothesis- The average salary of managers in the advertising industry is $180,000 per year

Alternative hypothesis- The average ...

#### Solution Summary

Null and alternative hypothesis for ABC are examined.

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