S1 - Basic/Quick Question Help Watch

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nas7232
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#1
Report Thread starter 13 years ago
#1
Pretend i have some data here e.g 200, 23, 123, 123, 123, 215, 155, 158

Let the mean be X
Let the s.d be Y

if i add another piece of data in there which is = to X

i know the mean will not change but will the standard deviation change?
[simple questions i never have been taught]
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TheWolf
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It would cus ∑(x²)/n would be different.
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idiopathic
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(Original post by nas7232)
Pretend i have some data here e.g 200, 23, 123, 123, 123, 215, 155, 158

Let the mean be X
Let the s.d be Y

if i add another piece of data in there which is = to X

i know the mean will not change but will the standard deviation change?
[simple questions i never have been taught]
Why don't you try it
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