83 a Nationally social workers average 102 years of experien

8.3) a. Nationally, social workers average 10.2 years of experience. In a random sample, 203 social workers in greater metropolitan Shinbone average only 8.7 years with a standard deviation of 0.52. Are social workers in Shinbone significantly less experienced? (Note the wording of the research hypotheses. These situations may justify one-tailed tests of significance. If you choose a one-tailed test, what form would the research hypothesis take, and where would the critical region begin?)

b. The same sample of social workers reports an average annual salary of $25,782 with a standard deviation of $622. Is this figure significantly higher than the nation average of $24,509? (The wording of the research hypotheses suggests a one-tailed test. What form would the research hypothesis take and where would the critical region begin?)

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