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padilas [110]
3 years ago
10

Noah testes several men of different ages to see how many push ups they could complete in a row without resting. An approximate

least squares regression line was used to predict the number of push ups from a given age of man
Mathematics
2 answers:
aev [14]3 years ago
7 0

Answer:

Estimator 'b' from sample regression function 'y = b0 + b1x + u' satisfies OLS, if Σu^2 = Σ (Y - y)^2 is minimum

Step-by-step explanation:

Regression shows the relationship between independent (causal) & dependent (effected) variables.

As per given case : Independent variable = men's are = x ; dependent variable = number of push ups = y

  • Population regression function [ PRF ] : Y | Xi = B0 + B1Xi
  • Sample (estimated) regression function [SRF] : y = b0 + b1x + u

OLS [Ordinary Least Square] model is a method used for finding linear regression parametes (b's), such that it minimises the sum of squared residuals. Residuals are the error terms between PRF actual value & SRF estimated value

So, b's from SRF are OLS estimators if, Σu^2 = Σ (Y - y)^2 is minimum

galina1969 [7]3 years ago
7 0

Answer:

This man completed 10 fewer push ups than predicted based on his age.

Step-by-step explanation:

Answer from Khan

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alexandr1967 [171]

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Answer:

  9n^4

Step-by-step explanation:

The divisor and quotient can be interchanged to find the divisor:

  \dfrac{18n^6+27n^5-36n^4}{2n^2+3n-4}=\boxed{\text{Blank 1}}

Such division is carried out by first finding the quotient of the highest-degree terms:

  \dfrac{18n^6}{2n^2}=\dfrac{18}{2}n^{6-2}=9n^4

This value is used to multiply the denominator and subtract that product from the numerator to find the new numerator. The new numerator is zero, so the value that goes in Blank 1 is ...

  9n^4

_____

The attachment shows the long division.

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VMariaS [17]

Answer:

-10

Step-by-step explanation:

The equation would be -8 - (-10) = 2. When subtracting a negative, you are actually just adding a positive. It's like the two negative signs cancel each other out, so it would look more like -8 + 10 = 2. For the answer box, just put -10.

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