Question

Expand Daniel was recently hired at an electronics call center that receives thousands of incoming calls each day. Assume that the number of daily incoming phone calls is very nearly normally distributed with an unknown mean pu and an unknown standard deviation ơ. Daniel examines the call logs from a simple random sample of n days. He records the total number of calls on each of these days and calculates the mean number of calls per day, I, for the sample. Which of the following describes the sampling distribution of ? O a t-distribution with n-1 degrees of freedonm O a t-distribution with mean (u and standard deviation O a normal distribution with mean 0 and standard deviation 1 O a t-distribution with n de 71 a normal distribution with mean fi and standard deviation ơ O a normal distribution with mean μ and standard deviation 72

Answer 1