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Posted: February 3rd, 2022
Business Statistics Assignment
Week 7 Assignment
1. What does regression inform us? How is an r worth utilized in regression?
2. What’s interpolation? What’s extrapolation? Why is it harmful to extrapolate exterior the experimental area (the vary of your information)?
three. Given the next
Ebook
Pages (x variable)
Worth (y variable)
A
250
$5.20
B
317
$5.95
C
234
$four.95
D
417
$7.25
E
301
$5.95
F
315
$6.00
G
389
$6.95
a. Create a scatter diagram which exhibits the trendline (that is the regression line) and gives the coefficient of willpower on the graph itself.
b. What’s the equation of the trendline from the graph? (Simply copy it out of your graph)
c. In response to the equation of the trendline out of your graph, if a ebook had 357 pages, how a lot ought to it price?
d. In response to the equation of the trendline out of your graph, if a ebook prices $eight.50, what number of pages ought to it have?
e. Partially d, had been you interpolating or extrapolating? How have you learnt? How assured are you that the variety of pages would actually be what you calculated it to be? Why?
four. You might be offered with a number of values for Pearson’s product second correlation coefficient ( r ). Which one exhibits the strongest relationship? Why?
a. -Zero.97
b. -Zero.60
c. Zero.15
d. Zero.89
e. Zero.95
f. Zero
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