Question

Calculate standard deviation of the following concentrations of Fe(ppm) were reported: 20.2, 20.4, 20.3, 20.1, 19.9, 20.0 & 19.8.​

Answer 1

Answer:

Sum. The aggregate of a group of numbers. The formula is:Sum = , where the symbol ∑ represents adding all the data values.

0+20.5=20.5

20.5+-20.4=0.100000000000001

0.100000000000001+-20.3=-20.2

-20.2+-20.2=-40.4

-40.4+-20.1=-60.5

-60.5+-20=-80.5

-80.5+-19.9=-100.4

-100.4+-19.8=-120.2

Answer 2

Explanation:

Sum

Arithmetic mean (Simple Average)

Median

Range

Variance

Standard Deviation