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For the next question use the following table of critical values of Z Confidence Level C 90 1 645 Critical Z Z b 4 What is the margin of error M 95 1 96 5 24 pts The systolic blood pressure for the population of US adults is known to be normally distributed with unknown mean and known standard deviation of 12 mmHg You are asked to construct a 90 confidence interval for the population mean systolic blood pressure for US adults You sample 36 US adults and find the sample mean is 120 mmHg a 4 What critical value of Z should you use 4 What is the confidence interval d 4 Write a sentence interpreting the confidence interval 99 2 576 Escore e 4 If you kept c 90 but increased the sample size would the width of your confidence interval increase decrease or remain the same WHY f 4 If you kept n 36 but increased your level of confide width of your confiden 22