Is there any evidence that an animal's gestation period is related to the animal's lifespan? The...

  

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Is there any evidence that an animal's gestation period is related to the animal's lifespan? The scatterplot shows Gestation Period (in days) vs. Life Expectancy (in years) for 18 species of mammals. The highlighted point at the far right represents humans. Complete parts a through e. 600- 300- 40 80 Life Expectancy (yr) Gestation (days) a) For these data, r=0.532. This is not a very strong relationship. Do you think the association would be stronger if humans were removed? Explain. O A. Weaker. Correlation would decrease. O B. Stronger. It's easier to match a line to fewer data points. C. Weaker. There would be less data used. D. Stronger. Both slope and correlation would increase. 0000 b) Is there reasonable justification for removing humans from the data set? Explain. A. Yes, it is nowhere near any of the other data points. B. Yes, restricting the study to nonhuman animals would justify it. C. No, you cannot simply ignore data. D. No, the gestation period is in the middle of the other mammals. c) Here are the scatterplot and regression analysis for the 17 nonhuman species. Comment on the strength of the association. Dependent variable is: Gestation R-squared = 86.5% 600- 300- Variable Coefficient Constant 93.1373 20 Life Expectancy (yr) 40 LifExp 12.9799 The association is Gestation (days) Dependent variable is: Gestation R-squared = 86.5% Variable d) Interpret the slope of the line. 600- On average, for every year increase in life expectancy, the gestation Coefficient period V by about days. 300- (Round to two decimal places as needed.) 0- Constant 93.1373 40 Life Expectancy (yr) 20 LifExp 12.9799 e) A certain mammal has a life expectancy of about 30 years. Estimate the expected gestation period of this species. Dependent variable is: Gestation R-squared = 86.5% 600 days 300- Variable Coefficient Constant 93.1373 20 40 Life Expectancy (yr) LifExp 12.9799 (Do not round until the final answer. Then round to one decimal place as needed.) Gestation (d Gestation (days) Is there any evidence that an animal's gestation period is related to the animal's lifespan? The scatterplot shows Gestation Period (in days) vs. Life Expectancy (in years) for 18 species of mammals. The highlighted point at the far right represents humans. Complete parts a through e. 600- 300- 40 80 Life Expectancy (yr) Gestation (days) a) For these data, r=0.532. This is not a very strong relationship. Do you think the association would be stronger if humans were removed? Explain. O A. Weaker. Correlation would decrease. O B. Stronger. It's easier to match a line to fewer data points. C. Weaker. There would be less data used. D. Stronger. Both slope and correlation would increase. 0000 b) Is there reasonable justification for removing humans from the data set? Explain. A. Yes, it is nowhere near any of the other data points. B. Yes, restricting the study to nonhuman animals would justify it. C. No, you cannot simply ignore data. D. No, the gestation period is in the middle of the other mammals. c) Here are the scatterplot and regression analysis for the 17 nonhuman species. Comment on the strength of the association. Dependent variable is: Gestation R-squared = 86.5% 600- 300- Variable Coefficient Constant 93.1373 20 Life Expectancy (yr) 40 LifExp 12.9799 The association is Gestation (days) Dependent variable is: Gestation R-squared = 86.5% Variable d) Interpret the slope of the line. 600- On average, for every year increase in life expectancy, the gestation Coefficient period V by about days. 300- (Round to two decimal places as needed.) 0- Constant 93.1373 40 Life Expectancy (yr) 20 LifExp 12.9799 e) A certain mammal has a life expectancy of about 30 years. Estimate the expected gestation period of this species. Dependent variable is: Gestation R-squared = 86.5% 600 days 300- Variable Coefficient Constant 93.1373 20 40 Life Expectancy (yr) LifExp 12.9799 (Do not round until the final answer. Then round to one decimal place as needed.) Gestation (d Gestation (days)

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a STRONGER Both slope and correlation would increase As you can see it seems that only the X p... View the full answer