Practical Management Science
Practical Management Science
6th Edition
ISBN: 9781337406659
Author: WINSTON, Wayne L.
Publisher: Cengage,
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I used excel and got a 1.31 on this question, but my friend got another answer.

Purchasing agent Angela Rodriguez reported the number of sales calls she received from suppliers on each of the past 14 days. Compute
the variance for her daily calls during the 14-day period. Treat the data as a sample
Number of calls and the number of days
Calls (x)
4
6
7
8
Number of days f(x)
1
3
2
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Transcribed Image Text:Purchasing agent Angela Rodriguez reported the number of sales calls she received from suppliers on each of the past 14 days. Compute the variance for her daily calls during the 14-day period. Treat the data as a sample Number of calls and the number of days Calls (x) 4 6 7 8 Number of days f(x) 1 3 2
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