Following is the information of annual salary of 50 people in thousands of $ with a mean
Question:
Following is the information of annual salary of 50 people in thousands of $ with a mean salary of $148.4 ( thousands of $'s). Find the standard deviation of the grouped data.
Mean Salary ( large overrightarrow{x} ) = 148.4
small M overrightarrow{x} small M-overrightarrow{x} small left(M-overrightarrow{x}ight)^2 small f small left(M-overrightarrow{x}ight)^2.f
125 148.4 2
135 148.4 5
145 148.4 25
155 148.4 10
165 148.4 8
∑ f = 50 large Sigmasmall left(M-overrightarrow{x}ight)^2.f =
Standard Deviation = small sqrt{frac{Sigmaleft(M-overrightarrow{x}ight)^2.f}{n-1}} = ( up to 2 decimal places)
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Management Accounting Information for Decision-Making and Strategy Execution
ISBN: 978-0137024971
6th Edition
Authors: Anthony A. Atkinson, Robert S. Kaplan, Ella Mae Matsumura, S. Mark Young