September 28, 2025 Claire B 0 Comments

9.
Emily Andrews has invested in a science and technology mutual fund. Now she
is considering liquidating and investing in another fund.She would like to
forecast the price of the science and technology fund for the next month
before making a decision.She has collected the following data onthe average
price of the fund during the past 20 months:
Month Fund Price
1 $63 1/4
2 60 1/8
3 61 3/4
4 64 1/4
5 59 3/8
6 57 7/8
7 62 1/4
8 65 1/8
9 68 1/4
10 65 1/2
11 68 1/8
12 63 1/4
13 64 3/8
14 68 5/8
15 70 1/8
16 72 3/4
17 74 1/8
18 71 3/4
19 75 1/2
20 76 3/4
a. Using a 3-month
average,forecast the fund price for month 21.
b.
Using a 3-month weighted average with the most recent month weighted 0.60,the
nextmost recent month weighted 0.30,and the third month weighted
0.10,forecast the fundprice for month 21.
c. Compute an exponentially
smoothed forecast,using ?=0 .40, and forecast the fund pricefor month 21.
d. Compare the forecasts in
(a),(b),and (c),using MAD,and indicate the most accurate.
26.
Carpet City wants to develop a means to forecast its carpet sales. The store
manager believes thatthe store’s sales are directly related to the number of
new housing starts in town.The manager hasgathered data from county records
on monthly house construction permits and from store recordson monthly
sales.These data are as follows:
Monthly Carpet Sales (1,000
yd.) Monthly ConstructionPermits

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