Hello everyone, I just have one Alg II math question that I need help on. This question is dealing with 'Standard Scores'. Thanks in advance for all your help in assisting me, thanks much!


Heres the question:


Use technology or a z-score table to answer the question.

The average balance at a credit union is normally distributed with a mean of $240 and a standard deviation of $100. Joe's balance is $260.

What percent of all accounts at the credit union have a balance less than Joe's?

Round your answer to the nearest whole number.







Guest Apr 23, 2018

Don't know much about this but I think I can  feel  my way around......LOL!!!



Mean  = $240

SD  = $100

Joe's Balance = $260



Z  =   [ Joe's Balance  - Mean Balance ]   /  SD  =


[ 260  - 240 ] / 100   = 


20/100  =  




Looking up .2 in  a  table of Z scores we find that  the value is  .5793


So....58%  have a balance  less than Joe's



cool cool cool

CPhill  Apr 23, 2018

15 Online Users

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.