Wednesday

March 4, 2015

March 4, 2015

Posted by **Anonymous** on Wednesday, April 9, 2014 at 2:24am.

- math -
**Reiny**, Wednesday, April 9, 2014 at 7:07amz-score for the 169 = (169-180)/8 = -1.375

x-score for the 191 = (191-180)/8 = +1.375

look up value for 1.375 and the value for -1.375

subtract the two values

You should get .8309

I recommend this webpage for these type of questions.

http://www.wolframalpha.com/input/?i=plot+y+%3D+%28x%5E2%2B4x-5%29%2F%28x-2%29+%2C+y+%3D+x%2B6

The beauty of this page is that it lets you enter the mean and SD directly without even finding the z-score.

Personally, I don't see any difference in going to some table that "somebody" created ages ago, and using this page. In either case you are not actually doing the arithmetic.

notice you can just enter 180 for the mean, 8 for the sd, click on the "between" and enter 169 and 191 to get 0.8309

Bookmark this webpage for future use.

**Answer this Question**

**Related Questions**

Math - Weights of the vegetables in a field are normally distributed. From a ...

Math - Weights of the vegetables in a field are normally distributed. From a ...

Math - I have no idea how to calculate z scores Weights of the vegetables in a ...

Algebra - The weights of boxes of candies produced in a factory are normally ...

Statistics - The weights of adult males are normally distributed with a mean of ...

Statistics - The weights of adult males are normally distributed with a mean of ...

math - Instant dinner comes in packages with weights that are normally ...

math - Instant dinner comes in packages with weights that are normally ...

statistics - The actual weights of bag of pet food are normally distributed.The ...

college math - Math homework please help!! 2. Suppose that people’s weights are ...