Question

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 studies by S. Twiss et al. in the article “Variation in Female Grey Seal (Halichoerus grypus) Reproductive Performance Correlates to Proactive-Reactive Behavioural Types” (PLOS ONE 7(11): e49598. doi: 10,1371/journal.pone.0049598). The average lactation (nursing) period of all earless seals is we days. A hypothesis test is to be performed to decide whether the mean lactation period of grey seals differs from 23 days.

For each hypothesis test: a. Determine the null hypothesis

b. Determine the alternative hypothesis

c. Classify the hypothesis test as two-tailed, left-tailed, right-tailed

Answer 1