Step 1 From the provided information, Sample size (n) = 30 Sample mean (x) = 111 Sample standard deviation (s) = 1.7 Since, the population standard deviation is unknown, therefore, the t distribution will be use Step 2 The hypotheses are as follow: Ho:H = 120 HaiH # 120 Confidence level = 95% Level of significance (a) = 1- 0.95 = 0.05 The value of the test statistic can be obtained as: x - µ t = S

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