Friday

July 25, 2014

July 25, 2014

Posted by **Amanda** on Monday, October 27, 2008 at 10:11pm.

a)Find the chance that the average of the draws will be in the range 65 to 85.

b)repeat for the range 74 to 76.

- statistics -
**MathGuru**, Tuesday, October 28, 2008 at 9:21pmUse z-scores and a z-table for this problem. Because you are given a sample size, you will need to include the sample size in the calculation:

z = (x - mean)/(sd/√n)

For a):

This will be very close to 100% chance that the average of the draws will be in the range listed (z-scores will be very large).

For b):

z = (74 - 75)/(10/√100)

z = (76 - 75)/(10/√100)

Finish the calculation for both z-scores. Use the z-table to find the probability between the two scores.

I hope this will help get you started.

**Related Questions**

statistics - One hundred draws will be made at random with replacement from the ...

Statistics - You draw three tickets at random with replacement from the box. ...

Statistics - Hello. I would like to ask a college statistics question. Q. One ...

maths - A random number generator draws at random with replacement from the ...

statistics - A random number generator draws at random with replacement from the...

Statistics - A school is running a raffle. There are 100 tickets, of which 3 are...

statistics - in the spring of 2001, a university had 40,000 registered students...

college stats - I am having a lot of trouble with these questions can anyone ...

statistics - You have hired a polling organization to take a simple random ...

Moanalua Middle School - One box contains six color cards: two blue, three ...