Textbook ExpertVerified Tutor
16 Nov 2021
Given information
Given that, an electronics retailer used regression to find a simple model to predict sales growth in the first quarter of the new year (January through March). The model is good for 90 days, where x is the day. The model can be written as follows: ŷ = 101.32 + 2.48x where ŷ is in thousands of dollars.
Then we have to predict the sales to be on day 90.
Step-by-step explanation
Step 1.
The given model is 
Then to calculate the number of sales to be on day 90, we have to put 
in the model.
We get, 
And also it is given that ŷ is in thousands of dollars. So we have to multiply 1,000 to the answer.
Hence 
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Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208
Solutions
Chapter
Section
- Problem 1
- Problem 2
- Problem 3
- Problem 4
- Problem 5
- Problem 6
- Problem 7
- Problem 8
- Problem 9
- Problem 10
- Problem 11
- Problem 12
- Problem 13
- Problem 14
- Problem 15
- Problem 16
- Problem 17
- Problem 18
- Problem 19
- Problem 20
- Problem 21
- Problem 22
- Problem 23
- Problem 24
- Problem 25
- Problem 26
- Problem 27
- Problem 28
- Problem 29
- Problem 30
- Problem 30
- Problem 31
- Problem 32
- Problem 33
- Problem 34
- Problem 35
- Problem 36
- Problem 37
- Problem 38a
- Problem 38b
- Problem 38c
- Problem 38d
- Problem 38e
- Problem 39a
- Problem 39b
- Problem 39c
- Problem 40
- Problem 41
- Problem 42
- Problem 43
- Problem 44
- Problem 45
- Problem 46
- Problem 47
- Problem 48
- Problem 49
- Problem 50a
- Problem 50b
- Problem 50c
- Problem 50d
- Problem 51
- Problem 52
- Problem 53
- Problem 54
- Problem 55
- Problem 56
- Problem 57b
- Problem 58
- Problem 59
- Problem 60
- Problem 61
- Problem 71i
- Problem 85f
- Problem 85g
- Problem 85h
- Problem 85i