Use the standard normal distribution or the t distribution

Last updated: 7/16/2023

Use the standard normal distribution or the t distribution to construct a 99 confidence interval for the population mean Justify your decision If neither distribution can be used explain why Interpret th in a random sample of 42 people the mean body mass index BMI was 29 1 and the standard deviation was 6 12 Which distribution should be used to construct the confidence interval Choose the correct answer below A Use a normal distribution because the sample is random na 30 and a is known B Use a t distribution because the sample is random na 30 anda is unknown OC Use a normal distribution because the sample is random the population is normal and a is known D Use a t distribution because the sample is random the population is normal and a is unknown E Neither a normal distribution nor a t distribution can be used because either the sample is not random or n 30 and the population is not known to be normal Select the correct choice below and if necessary fill in any answer boxes to complete your choice OA The 99 confidence interval is Round to two decimal places as needed OB Neither distribution can be used to construct the confidence interval