Question
Weighted Moving Average with weights 2, 2, 1 Week Actual 3-week weighted moving average (2-2-1) Error |Error| 1 17 2 21 3 19 4 23
Weighted Moving Average with weights 2, 2, 1
Week
Actual
3-week weighted moving average (2-2-1)
Error
|Error|
1
17
2
21
3
19
4
23
5
18
6
16
7
20
8
18
MAD
1.Bob White is conducting research on monthly expenses for medical care, including over-the-counter medicine. His dependent variable is monthly expenses for medical care while his independent variable is number of family members. Below is his Excel output.(10 points)
SUMMARY OUTPUT
Regression Statistics
Multiple R
0.695
R Square
Missing
Adjusted R Square
0.474
Standard Error
55.278
Observations
21
ANOVA
df
SS
MS
F
Significance F
Regression
1
99929.47
32.70311
0.00016
Residual
19
58057.48
3055.657
Total
20
157987
Coefficients
Standard Error
t Stat
P-Value
Intercept
110.47
35.53407
3.109087
0.0057
X
16.83
0.819024
5.718663
0.00016
a)What is the estimated relationship? (2 points)
b)What is the value of the correlation coefficient? (2 points)
c)Based on the significanceF-test, is this model a good prediction equation? (2 points)
d)The R Square value is Missing. What is the actual value? (2 points)
e)The R Square value is Missing. What is the actual value? (2 points)
f)How many observations are there in the model? (2 points)
2.An electronics company is looking to develop a regression model to predict the number of units sold for a special running watch. Data is provided below:
Use Excel to run regression analysis and develop a relationship between Sales, Price, and Advertising(5 points)
Sales (units)
Price ($)
Advertising ($)
500
100
50
480
120
40
485
110
45
510
103
55
490
108
40
488
109
30
496
106
45
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