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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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Nosaira solved an equation. Her work is shown below: 3(2x + 1 ) = 2(x + 1) + 1 6x + 3 = 2x + 2 + 1 6x + 3 = 2x + 3 4x = 0 x = 0
maksim [4K]
3(2x+1)=2(x+1)+1
6x+3=2x+2+1
6x+3=2x+3
minus 2x
4x+3=3
minus 3
4x=0
divide by 4
x=0

her work is correct
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7 0
3 years ago
Read 2 more answers
The sum of three consecutive odd integers is 76 less then seven times the middle number.Find three integers
Nana76 [90]

The sum of three consecutive odd integers is 76 less then seven times the middle number. The three integers are 17, 19 and 21 respeectively

<h3><u>Solution:</u></h3>

Since each consecutive odd integer is separated by a difference of  2

Let "n" be the first integer

n + 2 be the second integer

n + 4 be the third integer

Given that the sum of three consecutive odd integers is 76 less then seven times the middle number

Which means,

The sum of ( n, n + 2, n + 4) is equal to 76 less than seven times the middle number ( 7(n + 2))

That is,

n + n + 2 + n + 4 = 7(n + 2) - 76

3n + 6 = 7n + 14 - 76

4n = 68

n = 17

So we get:

First integer = n = 17

Second integer = n + 2 = 17 + 2 = 19

Third integer = n + 4 = 17 + 4 = 21

Thus the three consecutive odd integers are 17, 19 and 21 respeectively

5 0
3 years ago
I have more question then this
WINSTONCH [101]

9514 1404 393

Answer:

  A. CCW 180° about the origin

Step-by-step explanation:

Figure B appears to be a reflection of Figure A across the origin. Such a reflection can be described by any of ...

  • reflection across the origin
  • rotation 180° CW about the origin
  • rotation 180° CCW about the origin
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4 0
3 years ago
A westbound train travels 16 miles per hour slower than the eastbound train. If two trains are 800 miles apart after 5 hours wha
lozanna [386]

Answer:

6

Step-by-step explanation:

The rate can be calculated as follows

x + x -16

2x-16

(2x-16)×5

10x - 80= 800

10x = 300-80

10x, = 220

x = 220/10

= 22

22-16

= 6 mph

Hence the rate of the west bound tsin is 6mph

7 0
3 years ago
Plz help no guessing
vladimir1956 [14]

Those are alternate interior so congruent angles,

2x + 15 = 3x

15 = x

Choice A

7 0
3 years ago
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