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An oceanographer claims that the mean dive depth of a North Atlantic right whale is 115 meters. A random sample of 34 dive depths has a mean of 121.2 meters and a standard deviation of 24.2 meters. Is there enough evidence to reject the claim at α = 0.10?
(a) Identify the claim and state H0 and Ha,
(b) Use technology to find the P-value,
(c) Decide whether to reject or fail to reject the null hypothesis,
(d) Interpret the decision in the context of the original claim. Assume the population is normally distributed. |
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