In a random sample of 1,000 exams, the average score was 500 points with a standard deviation of 80 points.

Find the probability that the mean score of the population will be less than five points from the mean score of the sample.

Question

In a random sample of 1,000 exams, the average score was 500 points with a standard deviation of 80 points. 

Find the probability that the mean score of the population will be less than five points from the mean score of the sample.

anitas. · Answer

@Photon336 @jhonyy9 @dmezzullo @calculusxy @Owlcoffee @inkyvoyd @undeadknight26 @UliNK  @rebeccaxhawaii @Roxy.girl @robtobey We need a little help here!!! plz

anonymous · Answer

Google is a lovely thing dear.

anonymous · Answer

https://www.google.com/search?q=n+a+random+sample+of+1%2C000+exams%2C+the+average+score+was+500+points+with+a+standard+deviation+of+80+points&oq=n+a+random+sample+of+1%2C000+exams%2C+the+average+score+was+500+points+with+a+standard+deviation+of+80+points&aqs=chrome..69i57&sourceid=chrome&ie=UTF-8

haleyelizabeth2017 · Answer

I have tried google ;)

ulink · Answer

Lol ^

haleyelizabeth2017 · Answer

I like people who actually help me learn something XD

anonymous · Answer

Eh, my days of that are over.

anitas. · Answer

@Mehek14 @satellite73 some help would be appreciated!

anitas. · Answer

@Agl202

anitas. · Answer

@Agl202

anitas. · Answer

darn shes not on... ill tag other ppl @VladthePro @ltrout @Dylan_boss @okdutchman7

haleyelizabeth2017 · Answer

Thank you nini, but it's fine <3

vladthepro · Answer

90% = mean ± 1.645 SEm 
SEm = SD/√n 
All you got left is to calculate.

haleyelizabeth2017 · Answer

Do I multiply 1.645 by SEm?

haleyelizabeth2017 · Answer

Google must have been your friend, too ;)

anitas. · Answer

hahah

haleyelizabeth2017 · Answer

It's fine, I got it anyways XD Thanks mates

anitas. · Answer

ok what did you get tho?