=STDEV.P(number1,[number2],...)
=STDEVP(B3:B7)
This returns the standard deviation of the breaking strength assuming that only 5 tools were produced.
=STDEVP(A1:A9,C1:C9)
This returns the standard deviation of the breaking strength and the weight assuming that only 9 tools were produced.
=STDEVP(D3:D20,F3:F20)
This returns the standard deviation of the breaking strength and the weight assuming that only 18 tools were produced.
=STDEVP(G1:G100,H1:H100)
This returns the standard deviation of the breaking strength and the weight assuming that only 100 tools were produced.
The STDEVP function calculates the standard deviation for data in a population, providing a measure of how spread out the data is in relation to the mean.