A-level maths, coding/standard deviation
I keep getting the wrong answer every time I attempt this question, any help would be appreciated!
The weekly income, i , of 100 women workers was recorded.
the data were coded using y=(i-90)/100 and the following summations were obtained:
∑y=131, ∑y ²=176.84
Work out an estimate for the standard deviation of the actual women workers' weekly income.
The weekly income, i , of 100 women workers was recorded.
the data were coded using y=(i-90)/100 and the following summations were obtained:
∑y=131, ∑y ²=176.84
Work out an estimate for the standard deviation of the actual women workers' weekly income.
Original post by murrayma767
I keep getting the wrong answer every time I attempt this question, any help would be appreciated!
The weekly income, i , of 100 women workers was recorded.
the data were coded using y=(i-90)/100 and the following summations were obtained:
∑y=131, ∑y ²=176.84
Work out an estimate for the standard deviation of the actual women workers' weekly income.
The weekly income, i , of 100 women workers was recorded.
the data were coded using y=(i-90)/100 and the following summations were obtained:
∑y=131, ∑y ²=176.84
Work out an estimate for the standard deviation of the actual women workers' weekly income.
It would be good to see what you tried, even if its wrong.
(edited 6 months ago)
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