Kilograms and gestation period

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Reference no: EM13966193

It is believed that the average size of a mammal species is a major factor in the period of gestation (the period of development in the uterus from conception until birth). In general, it is observed that the bigger the mammal is, the longer the gestation period. Table 1 gives adult mass in kilograms and gestation period in weeks of some species (source: https://www.saburchill.com/chapters/chap0037.html).

Table 1
Species	Adult mass (kg)	Gestation period (weeks)
African elephant	6000	88
Horse	400	48
Grizzly bear	400	30
Lion	200	17
Wolf	34	9
Badger	12	8
Rabbit	2	4.5
Squirrel	0.5	3.5

Table 2
Species	Gestation period (weeks)
Indian elephant	89.0
Camel	57.0
Sea lion	51.4
Dog	8.7
Rat	3.0
Hamster	2.3

(a) Calculate the least-squares regression line for these data with adult mass as the independent variable.

(b) Plot the points and the least-squares regression line on the same graph.

(c) Calculate the least-squares regression line for these data with gestation period as the independent variable.

(d) Assuming that the regression model of part (c) holds for all mammals, estimate the adult mass in kilograms for the mammals given in Table 2.

Reference no: EM13966193

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