hypothesis testing problems , psychology homework help

Dec 18th, 2016
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Question description

a tobacco company states that its product contains less than 5 parts per million of arsneic. an anti tobacco group says that it has tested this claim. they say they tested 400 samples and found 5.5 parts per million of arsenic with σ of 3.88. the group used α of .10. The group concluded that the tobacco company is understanding the arsenic content. test the claim. show all necesary steps. what are some errors that could have happened that would make the result invalid?

Tutor Answer

(Top Tutor) Daniel C.
School: UC Berkeley


Let  be the average amount of arsenic in parts per million.
The null and alternative hypotheses are:

H0 :   5
Ha :   5
Since the sample is large (n >30) a...

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