PS2 for 404
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Title: PS2 for 404

Essay Details:

Subject: Business
Author: Mary P
Date: December 2, 2012
Grade: B
Length: 2 / 575

Essay text:

Calculate the mean and standard deviation of actual sales. Line number Month (Period ) Actual Forecast x - ? (x - ?)* (x - ?) 10 January (1) 11.10 11.90 -3.43 11.79 20 February (2) 13.90 12.60 -0.63 0.40 30 March (3) 16.00 14.30 1.47 2.15 40 April (4) 13.70 14.90 -0.83 0.69 50 May (5) 14.30 17.50 -0.23 0.05 60 June (6) 18.20 13.70 3.67 13.44 July (7) 70 Total 87.20 80 Number of periods 6.00 90 Mean (?=Line 70/Line 90) 14.53 100 Sum of square deviations 28.53 110 Variance (?2=? ((x - ?)*(x - ?))/(6-1)) 5.71 120 Standard deviation (?=SQRT (? ((x - ?)*(x - ?))/(6-1)) 2.39 2. What is the correlation for this data set? Hint: think about what you are correlating...

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