Example 16.16 The following are the monthly figures of advertising expenditure and sales of a firm. It is generally found that advertising expenditure has an impact on sales after two months. Allowing for this. time lag, calculate coefficient of correlation between expenditure on advertisment and sales.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.4: Fractional Expressions
Problem 66E
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Example 16.16) The following are the monthly figures of advertising expenditure and sales of a firm. It is
generally found that advertising expenditure has an impact on sales after two months. Allowing for this
time lag, calculate coefficient of correlation between expenditure on advertisment and sales.
Transcribed Image Text:Example 16.16) The following are the monthly figures of advertising expenditure and sales of a firm. It is generally found that advertising expenditure has an impact on sales after two months. Allowing for this time lag, calculate coefficient of correlation between expenditure on advertisment and sales.
Month
Ad. Expenditure ('000 Rs)
Sales ( '000 Rs)
January
February
50
1200
60
1500
March
70
1600
April
Мay
90
2000
120
2200
June
150
2500
July
August
September
October
140
2400
160
2600
170
2800
190
2900
November
200
3100
December
250
3900
Transcribed Image Text:Month Ad. Expenditure ('000 Rs) Sales ( '000 Rs) January February 50 1200 60 1500 March 70 1600 April Мay 90 2000 120 2200 June 150 2500 July August September October 140 2400 160 2600 170 2800 190 2900 November 200 3100 December 250 3900
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