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# Hypothesis Testing of Mean: Z & t test

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Question 3

Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim
Various temperature measurements are recorded at different times for a particular city. the mean of 20 degrees celcius is obtained for 40 temperatures on 40 different days. assuming that standard deviation =1.5 degrees celcius, test the claim that the population mean is 22 degrees Celcius. Use a 05.05 significance level.

Question 4

Test the given claim. Use the P-value method or the traditional method as indicated. Identify the null hypothesis, alternative hypothesis, test statistic, critical values or P-value, conclusion about null hypothesis and final conclusion that address original claim.
A simple random sample of 15 year old boys from one city is obtained and their weights in pounds are listed below. Use a 0.01 significance level to test the claim that these sample weights come from a population with a mean equal to 150 pounds. Assume that the standard deviation of the weights of all 15 year old boys in the city is known to be 16.7 pounds. Use the traditional method of testing hypothesis.
150 138 158 151 134 189 157 144 175 127 164