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June 22nd, 2014, 07:27 PM   #1
Joined: Jun 2014
From: Georgia

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Confusing word problem, finding the probability of the mean

The average square footage in an apartment in a town is 1,800 square feet with a standard deviation of 120 square feet. The square footage is normally distributed.You randomly select 10 apartments in the town. What is the probability that the mean will be more than 1900 square feet?

Not sure how to solve this one, is there a way to use the probability for normal distribution formula? Very very very lost. If anyone could explain how to solve this would be great, Thank you.
CreepyPastaMansion is offline  
June 23rd, 2014, 05:49 AM   #2
Joined: Feb 2012
From: Hastings, England

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Math Focus: Problem Solving
have you even attempted this? you must have some experience of using the normal distribution to be set this question

To solve this, I believe you need to use the central limit theorem,which you can read a little about here:

hopefully that should help you get there, any other problems just ask, and show where you have got up too
nmenumber1 is offline  

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