Question

How to find the P value in hypothesis testing? The photo attached is the question per se.

Answer 1

one tailed or 2 tailed results?

Answer 2

in order to determine the p value, you have to know if the results you are looking for are one tailed or two tailed. and the hypots tell us that much.

Answer 3

It is two tailed.

Answer 4

since we are 2 tailed, we need to double that value we get for the z score probability

Answer 5

therefore, for z=2.28, it would be \[\frac{ 1-0.988696 }{ 2 } = 0.00565\]

Answer 6

?

Answer 7

hmm, P(z>2.28) depending on how you find the probability .. is .0113

we need to double that soo: P-value = .0226

http://www.wolframalpha.com/input/?i=P%28z%3E2.28%29