Answer Happy

Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value to/2, (b) find the critical value Zα/2, or (c) state that neither the normal distribution nor the t distribution applies. Here are summary statistics for randomly selected weights of newborn girls: n=151, x=28.2 hg, s= 6.1 hg. The confidence level is 95%. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. ta/2= O B. (Round to two decimal places as needed.) Zα/2 (Round to two decimal places as needed.) O C. Neither the normal distribution nor the t distribution applies.

A data set includes 106 body temperatures of healthy adult humans having a mean of 98.9°F and a standard deviation of 0.63°F. Construct a 99% confidence interval estimate of the mean body temperature of all healthy humans. What does the sample suggest about the use of 98.6°F as the mean body temperature? Click here to view a t distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. What is the confidence interval estimate of the population mean µ? °F<µ<°F (Round to three decimal places as needed.) T What does this suggest about the use of 98.6°F as the mean body temperature? O A. This suggests that the mean body temperature is lower than 98.6°F. O B. This suggests that the mean body temperature is higher than 98.6°F. O C. This suggests that the mean body temperature could very possibly be 98.6°F.