Question

In: Statistics and Probability

The table lists height (in) and weights (lb) of randomly selected 8 students. Height (in) 60...

The table lists height (in) and weights (lb) of randomly selected 8 students.
Height (in) 60 65 66 68 60 67 69 70

Weight (lb) 150 152 156 160 160 167 168 170

(a) Find the the value of coefficient of correlation r.
(b) Find the equation of the line of best best fit (trend line). What does variable y represents?
(c) Estimate weight of a student from the same group who is 64 inches tall.

Solutions

Expert Solution

Solution:

a) coefficient of correlation r= 0.701

calculation:

b) Here variable y represent Weight because weight is dependent on hight. So weight is dependent variable and height is independent variable.

The equation of line is:

Y=70.1104 + 1.3755X

c) for x=64 find y

Y= 70.1104 + 1.3755*64

Y= 158.14

calculation:

orchestra answered 1 year ago
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