Assume that a simple random sample has been selected from a normally distributed

Question

Assume that a simple random sample has been selected from a normally distributed population and test the given claim Idenaify the null and aternative hypotheses, test statstic, P-value, and state the frnal condlusion that addresses the orniginal claim A safety administration conducted erash tests of child booster seats for cars. Listed below are results from those tests, with the measurements given in hic (standard head injury condition units) The safety requirement is that the hic measurement should be less than 1000 hic Use a 0.05 significance level to test the claim that the sample is from a population with a mean less than 1000 hic. Do the resuils suggest that al of the chi booster seats meet the specified requirement? 752 743 1255 629 613 508 What are the hypotheses? OA. He' ., 1000 hic H p21000 hic no: > 1000 hic H, 21000 hic on H1 :

Explanation / Answer

a) Option C hypothesis are correct

b) sample mean = 750

Standard deviation = 263.4585

t = ((750-1000)/263.4585)*Sqrt(6) = -2.324

c) P value = P(t<-2.324) = 0.0338

Reject, Sufficient

Last Part. Option D is correct

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