(1 point) Notice: The first 4 problems in this assignment are variatioins of problems we also encountered in the assignm

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1 Point Notice The First 4 Problems In This Assignment Are Variatioins Of Problems We Also Encountered In The Assignm 1 (62.38 KiB) Viewed 95 times

(1 point) Notice: The first 4 problems in this assignment are variatioins of problems we also encountered in the assignment "Confidence intervals for Mean". However, in all 4 problems the sample size is not sufficiently large (as a rule of thumb bigger than 40). If the population standard deviation is not known, the confidence intervals based on the Z-critical values are providing limited accuracy. You are asked to repeat these same problems, THIS TIME USING THE T CRITICAL VALUES. The following random sample was selected from a normal distribution: 12 2 15 18 16 3 14 20 19 1 (a) Construct a 90% confidence interval for the population mean . SH (b) Construct a 95% confidence interval for the population mean u. <μs