Using the data in the frequency table below compute the correlation coefficient between advertising expenditure and sales. The data represent the number of months in which advertising expenditure was in a particular class AND sales were in a certain range
Using the data in the frequency table below compute the correlation
coefficient between advertising expenditure and sales. The data represent
the number of months in which advertising expenditure was in a particular
class AND sales were in a certain range. (17)
(c) Interpret the result, explaining what the coefficient of determination means
and how it can be used. (2) [20]
Sales (R'000s)
10-19 20-29 30-39 40-49 50-59
100-199 12 3 0 2 0
Ad. expend. 200-299 0 8 3 4 0
(R'00s) 300-399 3 5 14 2 3
400-499 0 8 8 20 5
500-599 0 2 12 13 28
TOTAL MAR
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Using the data in the frequency table below compute the correlation coefficient between advertising expenditure and sales. The data represent the number of months in which advertising expenditure was in a particular class AND sales were in a certain range
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