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# Basic Hypothesis testing watch

1. Very simple hypothesis testing question but due to the lack of examples and answers we've been given I can't work out how to it so kind of need a step by step guide if someones happy to help

The mean height of 20 male students was found to be 1.71m with a standard deviation of 2cm. Does this evidence support (at the 5% significance level) the belief that the mean height of all men is 1.7m? (This is a two-tail test.)
2. (Original post by DJC)
Very simple hypothesis testing question but due to the lack of examples and answers we've been given I can't work out how to it so kind of need a step by step guide if someones happy to help

The mean height of 20 male students was found to be 1.71m with a standard deviation of 2cm. Does this evidence support (at the 5% significance level) the belief that the mean height of all men is 1.7m? (This is a two-tail test.)
What would be the proposed distribution of the mean for the 20 students?
3. I think the mean height is normally distributed. (Because we've been told the s.d, something we wouldn't get if we had to do a t-test!)

H0: u = 1.71
H1: u is not 1.71

So we want to test: .

Can you use the information you have been given to work out what z is?
Do you know how to get the required value from the normal tables?

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