We would like lo construct a 95% contidence interval for the mean, based on a sample of 100 observations The sample standard deviation is 3.5 and the sampie rhaan is 20. The populabon standard deviaton is 4.2. Calculate the upper confidence limit. Round your answe to 3 decima's if needed. QUESTION 25 We would like to construct a 90\%, contidence interval for the mean, based on a sample of 35 observations. The sample standard deviation is 3.0 and the aample mean a 15. Calculate the upper confidence limit. Round your answer to 3 decimais it needed. QUESTION 26 Calculate the margin of error for an B0\% confidence interval for the mean, when the sample size is 20, be sample mean is 67 , and the sample standard doviation is Q.4. Reund your answer to 3 decimals if needed