Question

Lab Group	Tube Number	Control	Protein	Glucose
1	1	0	2	6.9
	2	0	2	3
2	1	1	0	18
	2	0	0	15
3	1	3	1	14
	2	3	1	15
4	1	1	2	13
	2	0	0	16
5	1	4	2	11
	2	4	1	16
6	1	0	3	3
	2	1	3	4
	SUM	17	17	134.9
	MEAN	1.4	1.4	11.24
	1/2 STAN DEV

FILL IN THE CHART WITH THE THREE 1/2 STAN DEV.

Answer 1

For calculating Standard deviation of a given sample following steps are followed -

a. First count the number of samples

b. Calculate the mean of the sample. For this add up all the values and divide the sum by the total number of samples.

c. Then subtract each value from the mean and take there square. Add up all these values. Finally divide this summation by total number of samples -1 i. e. N-1

So, for control standard deviation = 1.6

For protein standard deviation = 1.08

For glucose standard deviation = 5.53