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Sales Taxes (\$000) 10.

3.39:
The attached file (Tax) contains the quarterly sales tax receipts (in thousands of dollars) submitted to the comptroller of the Village of Fair Lake for the period ending March 2009 by all 50 business establishments in that locale:
10.3 11.1 9.6 9.0 14.5
13.0 6.7 11.0 8.4 10.3
13.0 11.2 7.3 5.3 12.5
8.0 11.8 8.7 10.6 9.5
11.1 10.2 11.1 9.9 9.8
11.6 15.1 12.5 6.5 7.5
10.0 12.9 9.2 10.0 12.8
12.5 9.3 10.4 12.7 10.5
9.3 11.5 10.7 11.6 7.8
10.5 7.6 10.1 8.9 8.6

a) Compute the mean, variance, and standard deviation for this population.
b) What percentage of these businesses have quarterly sales tax receipts with ±1, ±2, or ±3 standard deviations of the mean?
c) Compare your findings with what would be expected on the basis of the empirical rule. Are you surprised of the results (of B)?
Sales Taxes (\$000) 10.3 11.1 9.6 9.0 14.5 13.0 6.7 11.0 8.4 10.3 13.0 11.2 7.3 5.3 12.5 8.0 11.8 8.7 10.6 9.5 11.1 10.2 11.1 9.9 9.8 11.6 15.1 12.5 6.5 7.5 10.0 12.9 9.2 10.0 12.8 12.5 9.3 10.4 12.7 10.5 9.3 11.5 10.7 11.6 7.8 10.5 7.6 10.1 8.9 8.6

variance, and standard deviation for this population.
these businesses have quarterly sales tax receipts with ±1, ±2, or ±3 standard deviations of the mean?
L
s with what would be expected on...

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