SOLUTION: Another 2 questions I need help with..... Find z so that approximately 58% of the standard normal curve lies to the right of z. Use a student's t distribution table to find t

Algebra ->  Probability-and-statistics -> SOLUTION: Another 2 questions I need help with..... Find z so that approximately 58% of the standard normal curve lies to the right of z. Use a student's t distribution table to find t      Log On


   

Question 438338: Another 2 questions I need help with.....
Find z so that approximately 58% of the standard normal curve lies to the right of z.
Use a student's t distribution table to find the critical value tc for a 95% confidence level for a t distribution with sample size n = 19.
Thank you for you help with all my concerns with statistics.

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Find z so that approximately 58% of the standard
normal curve lies to the right of z.
---
Find the z-value with a left-tail of 48%
invNorm(0.48) = -0.0502
-----------------------------
Use a student's t distribution table to find the critical value tc for a 95% confidence level for a t distribution with sample size n = 19.
---
That critical value is the same as for
a 2-tail test with alpha = 5% and df = 18
------------------------------------------
invT(0.025,18) = 2.101
===============================
Cheers,
Stan H.