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# Test of means and ANOVA

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16-9. At www.payscale.com, the median salary for a chiropractor in Kansas is \$82,400 per year. A group of recent graduates believe this amount is too low. In a random sample of 205 chiropractors who recently graduated, 170 began with a salary of more than \$82,400 and five earned a salary of exactly \$82,400.
1. State the null and alternate hypotheses.
2. State the decision rule. Use the .05 significance level.
3. Do the necessary computations and interpret the results.

Problem #2
16-21. The following sample data were obtained from three populations that did not follow a normal distribution.
Sample 1 Sample 2 Sample 3
50 48 39
54 49 41
59 49 44
59 52 47
65 56 51
57
1. State the null hypothesis.
2. Using the .05 level of risk, state the decision rule.
3. Compute the value of the test statistic.
4. What is your decision on the null hypothesis?