Tutorial 9 Solution

Tutorial 9 Solution - AB103: Statistical and Quantitative...

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AB103: Statistical and Quantitative Methods Tutorial 9: Solutions 1. 6.77 a. Since the population in question is normally distributed with standard deviation of 100, then the sampling distribution of sample mean X is normally distributed regardless of the sample size with mean μ X of 500 assuming Ho is true, and standard deviation σ X of 100/ 25 = 20, i.e., X N(500, 20 2 ): X 500 b . As the variance of the sampling distribution of X is known, Z test can be used. The critical
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Tutorial 9 Solution - AB103: Statistical and Quantitative...

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