3. How Long Are Mammals Pregnant? The dataset MammalLongevity includes information on length of gestation (i.e. length of pregnancy in days) for 40 species of mammals. Use the data and a randomization distribution created by StatKey (include a printout with p-value highlighted) to test at the 5% signicance level if the average length of gestation for mammals is more than 150 days. Include and label all steps of a randomization hypothesis test. 1. 2. 3. 4 Dene the parameter in context and state the null and alternative hypotheses Calculate or identify the sample statistic Use a randomization distribution to nd the p-value Make a formal decision about the null hypothesis, Ho ' Reject Ho if p-value