Question
You are the foreman of the Bar-S cattle ranch in Colorado. A neighboring ranch has calves for sale, and you are going to buy some
You are the foreman of the Bar-S cattle ranch in Colorado. A neighboring ranch has calves for sale, and you are going to buy some calves to add to the Bar-S herd. How much should a healthy calf weigh? Let x be the age of the calf (in weeks), and let y be the weight of the calf (in kilograms).
x | 1 | 5 | 11 | 16 | 26 | 36 |
---|---|---|---|---|---|---|
y | 39 | 47 | 73 | 100 | 150 | 200 |
Complete parts (a) through (e), given
- x = 95,
- y = 609,
- x2 = 2375,
- y2 = 81,559,
- x y = 13,777, and
- r 0.997.
(b)Verify the given sumsx,y,x2,y2,x y, and the value of the sample correlation coefficientr. (For each answer, enter a number. Round your value forrto three decimal places.)
x=
y=
x2=
y2=
x y=
r= (
Find, and. Then find the equation of the least-squares line=a+b x. (For each answer, enter a number. Round your answers forandto two decimal places. Round your answers foraandbto three decimal places.)
x =
y =
y= ______ +________ x
(e)Find the value of the coefficient of determinationr2. What percentage of the variation inycan beexplainedby the corresponding variation inxand the least-squares line? What percentage isunexplained? (For each answer, enter a number. Round your answer forr2to three decimal places. Round your answers for the percentages to one decimal place.)
r2=
explained = %
unexplained = %
(f)The calves you want to buy are10weeks old.What does the least-squares line predict for a healthy weight (in kg)? (Enter a number. Round your answer to two decimal places.) _______ kg
Please explain to me how to solve these. I know how to create a scatter plot but after that I'm lost
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