The mean annual cost of car insurance is $939. The standard deviation is $300. What is the standard deviation of x-bar?
You have been asked to compute the probability that a simple random sample of car insurance policies of size 100 will have a sample mean within $25 of the population mean.
You have been asked to compute the probability that a simple random sample of car insurance policies of size 100 will have a sample mean within $25 of the population mean.
1 Answer
Jun 27, 2018
SD of
Explanation:
In this case,
SE =
