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

Question

anonymous · Answer

attachment

amistre64 · Answer

one tailed or 2 tailed results?

amistre64 · Answer

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.

anonymous · Answer

It is two tailed.

amistre64 · Answer

|dw:1429849178229:dw|

amistre64 · Answer

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

anonymous · Answer

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

anonymous · Answer

?

amistre64 · Answer

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