A sample of 50 pieces of data gave:

Calculate the mean and standard deviation of the data.

What i've done:

I found out

and for standard deviation

which

but in the back of the book it says 0.5!

thanks for you help!

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- November 10th 2009, 11:03 AMBabyMiloMean and Standard Deviation
A sample of 50 pieces of data gave:

Calculate the mean and standard deviation of the data.

What i've done:

I found out

and for standard deviation

which

but in the back of the book it says 0.5!

thanks for you help!