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#1 2012-04-28 07:08:26

mom
Member
Registered: 2012-04-25
Posts: 94

hypothesis test

Please help. I did work this through but something is telling me that I did it incorrectly.

A sample of 27 blue jellybeans with a mean wt of 0.850 g was taken. Assume that the standard deviation is known to be 0.0565 g. Consider the hypothesis test that uses a 0.05 significance level to test the claim that the mean wt of all jellybeans is equal to 0.8545 g. ( the wt necessary so that bags of jellybeans have the weight printed on the package). Assume the weight of the jellybeans is normally distributed.
(a) What is the test statistic?
I got .32
(b) What are the critical values?
I got -0.99,0.99
(c) What is the P-value?
I got .7490
(d) what is the final conclusion?
I got
Fail to reject H0, There is not sufficient evidence to warrant rejection of the claim that the mean weight of jellybeans is equal to 0.8545 g.

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