# Thread: Quick question on p value?

1. ## Quick question on p value?

hey

• does anyone know why sometimes the p value is taken away from 1, other times you minus it from .5 and other times its just left?
• and does anyone know how to get a value of a confidence interval?

thanks and sorry i know they're quite easy!!

2. Originally Posted by eleahy
hey

• does anyone know why sometimes the p value is taken away from 1, other times you minus it from .5 and other times its just left?
• and does anyone know how to get a value of a confidence interval?

thanks and sorry i know they're quite easy!!

Those questions make very little sense, confidence interval for what..? the mean..? do you want to use z-test or t-test?

How did you think this is related to calculus?

3. we're doing it in 2nd year calculus in university?? is it not??

by confidence interval i ment find confidence interval of say 95.66 i know theres a table for 95 90 but other than them figures how can you find the confidence interval.

and p value when you are doing hypothesis testing how do you know how to get the p value. and using z test for both
sorry i wasn't clear enough