# Homework Help: Statistics - Tests of Hypotheses

1. Apr 1, 2012

### XodoX

1. The problem statement, all variables and given/known data
Consider N(μ, σ2=40) distribution. To test H0:=32 against H1:μ>32, we reject H0if the sample mean $\overline{X}$≥c. Find the sample size n and the constant c such that OC(μ=32)=0.90 AND OC(μ=35)=0.15.

2. Relevant equations

What I don't know

3. The attempt at a solution

Can't figure out how to do this one.

2. Apr 1, 2012

### Ray Vickson

Show your work. Tell us why you cannot just use the material from the textbook or the course notes to get started with this problem.

RGV

3. Apr 1, 2012

### XodoX

What work? I do not have anything. "What I don't know" under relevant equation means I don't know which equation to use, because I do not find one that would work here. If I had found something, I would not have asked.

Last edited: Apr 1, 2012