(i)[3]
Calculate the mean and standard deviation for the $36$ values.
(ii)[4]
A further data value of $29$ has been included in the sample. Find the standard deviation of the full set of $37$ values.
Mathematics 9709 · AS & A Level · Sampling and estimation
Sampling and estimation — practice question
For a sample of $36$ data values, $x$, the results were $\Sigma (x - 45) = -148$ and $\Sigma (x - 45)^2 = 3089$.