A timple linear regression model will always have a single dependent vakiable, while a multiple regression model wil hake more than one dependent variables. frue Ferse QUESTION 24 We would like to conatruct a 95% confidence interval for the mean, based on a sample of 100 observations. The samplo standard deviation is 3.5 and the sample ine an is 20. The population standard deviation is 42 . Calculate the upper confidence limit. Round your answer to 3 decimals if needed. QUCSTION 25 We woild like to construct a 90\%, confidence interval for the mean, based on a sample of 35 observations. The sample standard deviation is 3.0 and the sampin mean is 15. Caloutath the upper confidence limit. Round your answer to 3 decimals if needed