Central limit theorem?
The mean number of words per minute (WPM) read by sixth graders is 89 with a variance of 625.
If 96 sixth graders are randomly selected, what is the probability that the sample mean would be greater than 93.02 WPM? Round your answer to four decimal places.
Thank you
The mean number of words per minute (WPM) read by sixth graders is 89 with a variance of 625.
If 96 sixth graders are randomly selected, what is the probability that the sample mean would be greater than 93.02 WPM? Round your answer to four decimal places.
Thank you
2 Answers
see below
Explanation:
We are not told what the background distribution is. But because the sample size is greater than
it states that for any distribution if the population mean is
in this case we have
using tables