Determine the null hypothesis and alternative hypothesis in symbols, 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 C is obtained for 40 temperatures on 40 different days. Assuming that s = 1.5 degrees C, test the claim that the population mean is 22 degrees C. Use a .05 level of significance.