Wednesday
July 23, 2014

Homework Help: stat

Posted by Anonymous on Sunday, April 15, 2007 at 4:35pm.

the average number of pushups a United States Marine does daily is 300, with a standard deviation of 50. A random sample of 36 marines is selected. What is the probability that the sample mean is at most 320 push-ups?

With a mean of 300, you are looking for a sample using a Standard Error of the Mean (SE). (The SE functions the exact same way for a distribution of means as the SD does for a distribution of raw scores.)

SE = SD/(sq.rt.of N) = 50/6

Once you can determine how many SE above the mean the value of 320 is, use the "Area Under the Normal Distribution" table in the back of your statistics book to find the probability.

I hope this helps. Thanks for asking.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

stat. - The average age of a vehicle registered in the United States is 8 years...
statistics - A specific study found that the average number of doctor visits per...
statistics - A specific study found that the average number of doctor visits per...
Statistics - The average age of vehicles registered in the united states is 96 ...
statistics - The average age of a vehicle registered in the United States is 8 ...
Stat - A random sample of 50 households in community A has a mean household ...
Stats. - The average age of a vehicle registered in the United States is 8 years...
MTH- STAT 201 - Can someone please help how to solve this I keep getting the ...
college stats - help please!!! 1. The average number of bumped passengers per ...
Statisitics:Standard Deviation of Population and o - Standard Deviation of ...

Search
Members