Concept explainers
In Exercises 9.15–9.22, hypothesis tests are proposed. For each hypothesis test,
- a. determine the null hypothesis.
- b. determine the alternative hypothesis.
- c. classify the hypothesis test as two tailed, left tailed, or right tailed.
9.16 Grey-Seal Nursing. Grey seals are one of several types of earless seals. The length of time that a female grey seal nurses her pup is studied by S. Twiss et al. in the article “Variation in Female Grey Seal (Halichoerus grypus) Reproductive Performance
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