How much its 5+3+3×15=
2 answers:
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Answer:
a)
b)
c)
Step-by-step explanation:
Data given
x: 500, 700, 750, 590 , 540, 650, 480
y: 7.00, 7.50 , 9.00, 6.5, 7.50 , 7.0, 4.50
Part a
We want to create a linear model like this :
Wehre
And:
With these we can find the sums:
And the slope would be:
Nowe we can find the means for x and y like this:
And we can find the intercept using this:
And the line would be:
Part b
The correlation coefficient is given by:
For our case we have this:
n=7
The determination coefficient is given by:
Part c
For this case we must find the value of the variable "p" of the following equation:
We apply distributive property on the left side of the equation taking into account that and
:
We add similar terms:
We subtract from both sides of the equation:
We subtract 8 from both sides of the equation:
We divide by -6 on both sides of the equation:
Answer: