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A. Null Hypothesis Ho: = 200

Alternative Hypothesis H1: 200 (Two-Tailed test)

In a random sample of 100 subjects, the sample mean found to be x =220.

Population standard deviation is =50. Significance level is = 0.10

Calculate test statistics

For the given significance level = 0.10, find critical values (use attached table for Normal Distribution)

B. Draw the line for z-scale and use critical values to identify rejection region (shade these portions)

Mark position of test statistics on your z-scale.

Does test statistics fall in the rejection region?

Will you reject or do not reject Ho?