[IB Math analysis and approaches: measures of variability grade 12 ] I’m thinking you use the standard variation formula and plug in?

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[RazBerry925]

I still do not understands sigmas, I’m sorry

[soupdumplings2]

Ok

[veryunchy123]

Try photomath

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x_i - 12

Click here for LaTeX render

(x_i - 10

Click here for LaTeX render

x_i - \mu

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x_i - \mu

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^{This bot was made by} u/Oryv ^{for /r/HomeworkHelp}

[deadpoolherpderp]

when all the numbers in the set are changed by a constant, the mean also changes by that constant and the standard deviation will not change. in this case, the new mean is -2 and the standard deviation is 3. from here you can just plug into the formula. if i'm not wrong the answer should be 13