# BA520 my 4th week question set

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```					For ease, I have substituted ˆY with 

4-10 The operations manager of a musical instrument distributor feels that demand for bass drums may be related
to the number of television appearances b y the popular rock group Green Shades during the preceding month.
The manager has collected the data shown in the following table:

(a) Graph these data to see whether a linear equation might describe the relationship between the group's
television shows and bass drum sales.

(b) Compute the SST, SEE, and SSR. Find the least squares regression line for this data.

(c) What is your estimate for bass drum sales if Green Shades performed on TV six times last month?

SOLUTION:

A:

B:       Demand TV appearances
(X-X’) (Y-Y’) (X-X’)(Y-Y’) (Y--Y'
2       2
Y                           X
3    6.25      12.25     8.75     4      1       6.25
6                        7     2.25       0.25      0.75     5     1       2.25
7                         7    2.25        0.25     0.75     8     1       2.25
5                        6     0.25       2.25    - 0.75     7     7       0.25
10                        8    6.25      12.25     8.75      9     1       6.25
8
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