Data 2.2 on page 61 includes information on longevity (typical lifespan), in years, for 40 species of
Question:
(a) Use the data, available in MammalLongevity, and StatKey or other technology to test to see if the average lifespan of mammal species is different from 10 years. Include all details of the test: the hypotheses, the p-value, and the conclusion in context.
(b) Use the result of the test to determine whether μ = 10 would be included as a plausible value in a 95% confidence interval of average mammal lifespan. Explain.
Data 2.2 on page 61
The dataset MammalLongevity includes information on longevity (typical lifespan), in years, for 40 species of mammals as well as information on length of gestation for these same mammals.21 The longevity data are given in Table 2.14.
A dotplot of the longevity data is shown in Figure 2.6. We see a horizontal scale from 0 to 40 to accommodate the range of lifespans. Quite a few mammals have lifespans of 12, 15, and 20 years. All but one typically live between 1 and 25 years, while the elephants lifespan of 40 years is much higher than the rest. The value of 40 years appears to be an outlier for longevity in this group of mammals.
Figure 2.6
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Statistics Unlocking The Power Of Data
ISBN: 9780470601877
1st Edition
Authors: Robin H. Lock, Patti Frazer Lock, Kari Lock Morgan, Eric F. Lock, Dennis F. Lock