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A business receives supplies of copper tubing where the supplier has said that the average length...

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Statistics

A business receives supplies of copper tubing where the supplierhas said that the average length is 26.70 inches so that they willfit into the business’ machines. A random sample of 48 copper tubesfinds they have an average length of 26.77 inches. The populationstandard deviation is assumed to be 0.20 inches. At α=0.05, shouldthe business reject the supplier’s claim?

Yes, since p>α, we fail to reject the null and the null isthe claim
No, since p>α, we reject the null and the null is theclaim
No, since p>α, we fail to reject the null and the null isthe claim
Yes, since p<α, we reject the null and the null is theclaim

A consumer analyst reports that the mean life of a certain typeof alkaline battery is more than 63 months. Write the null andalternative hypotheses and note which is the claim.

Ho: μ > 63 (claim), Ha: μ ≤ 63
Ho: μ = 63 (claim), Ha: μ ≥ 63
Ho: μ ≤ 63, Ha: μ < 63 (claim)
Ho: μ ≤ 63, Ha: μ > 63 (claim)

Answer & Explanation Solved by verified expert
4.4 Ratings (616 Votes)
GivenClaim The supplier has said that the average length is 2670inchesHypothesized    See Answer
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