# Thread: hi, this is my firt year of college and i need help with my statistics homework :(

1. ## hi, this is my firt year of college and i need help with my statistics homework :(

Here's the question, I just need help on how to solve it because I have tried and im always wrong :/...

Use technology to find the per capita consumption that corresponds to a cumulative area of 0.75 in a normal distribution with a mean of 18.7 and a standard deviation of 4.1

the 75th percentile of annual consumption is ______.

2. ## Re: hi, this is my firt year of college and i need help with my statistics homework :

Have you been taught to use tables to find out how many standard deviations the 75th percentile is above the mean?

3. ## Re: hi, this is my firt year of college and i need help with my statistics homework :

yes, the z-table right?
(or the standard normal table)

4. ## Re: hi, this is my firt year of college and i need help with my statistics homework :

oh that's not what you said, and no, I have not been taught the tables for the percentiles