In a sample of 123 major limb amputations (arm above the elb…

In a sample of 123 major limb amputations (arm above the elbow or leg above the knee), the average hospital admittance was 11.3 days with a standard deviation of 4.2 days. a. Construct a 95% confidence interval for the mean hospital admittance.   b. If a 99% confidence interval were constructed with these data, would it be wider or narrower than the interval constructed in part (a)? Explain.