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)
|
