Homework Help: Statisitcs

Posted by Carmella on Wednesday, October 26, 2011 at 9:34pm.

Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?

Statisitcs - PsyDAG, Wednesday, October 26, 2011 at 10:59pm
You are dealing with a distribution of means.

Z = (score-mean)/SEm

SEm = SD/√n

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.

Answer this Question

Related Questions

statistics - 6. Facebook reports that the average number of Facebook friends ...
statistics - Facebook reports that the average number of Facebook friends ...
statistics - . Facebook reports that the average number of Facebook friends ...
statistics - Facebook reports that the average number of Facebook friends ...
statistics - Facebook reports that the average number of Facebook friends ...
statistics - Facebook reports that the average number of Facebook friends ...
statistics - Facebook reports that the average number of Facebook friends ...
statistics - Facebook reports that the average number of Facebook friends ...
Statistics - Facebook reports that the average number of Facebook friends ...
Math - Facebook reports that the average number of facebook friends worldwide is...

For Further Reading

First Name:
School Subject:
Answer: