Mathematics, 18.09.2019 12:10 azduce

Heights (in centimeters) and weights (in kilograms) of 7 supermodels are given below. find the regression equation, letting the first variable be the independent (x) variable, and predict the weight of a supermodel who is 173 cm tall.
heightweight17454166471765617655174 551765416850

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Data

Height (x) Weight (y)
174 54
166 47
176 56
176 55
174 55
176 54
168 50

Use a graphing program to find the regression. I used Excel. The result was:

y = 0.7583x - 78.083, with r^2 = 0.9242

Now subsitute x = 173 to find the predicted height:

y = 0.7583(173) - 78.083 = 53 kg

Answer from: noemir42

The regression equation:
y = a x+ b
a = ( n *∑(x y) - (∑x∑y) )/ ( N *∑x² - (∑x)²)
b = (∑y - a*∑x) / N,
where: N = 7, ∑x = 1210, ∑y=371, ∑ x y=64,168.
Using calculations or Excell tools, we can find the regression equation:
y = 0.758 - 78.08
The weight of supermodel who is 173 cm tall:
y = 0.758 * 173 - 78.08 = 53.054 kg

Answer from: Quest

median is the value separating the higher half of a data sample, a population or probablity distribution from the lower half.

step-by-step explanation:

say you have 3,8,7,3,1,9,8 order them from lowest to highest

if orderd it would be 1,3,3,7,8,8,9 now you take away from the lowest and the highest until you end up in the middle.

so you would remove the 1 and 9 leaving you with 5 digits remaining

when you've reached the middle that would be your answer so in this case the answer is 7

if there were two numbers left say 7 and 5 you'd and them together so 12 then divide by 2 witch would equal 6 so the answer would be 6

good luck on that project hoped i you at all

Answer from: Quest

Answerthe simplified expression is $2x + 28$ explanationthe given expression is, $2(10) + 2(x - - 4)$ let us deal with the bracket first.the two negatives in the parenthesis will become positive.the expression now becomes, $2(10) + 2(x + 4)$ we now expand the parenthesis to get, $20 + 2x + 8$ we group like terms to obtain, $2x + 8 + 20$ this simplifies to, $2x + 28$

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Heights (in centimeters) and weights (in kilograms) of 7 supermodels are given below. find the regre...