Question

Researchers have created every possible "knockout" line in yeast. Each line has exactly one gene deleted and all the other genes present (Steinmetz et al. 2002). The growth rate - how fast the number of cells increases per hour - of each of these yeast lines has also been measured, expressed as a multiple of the growth rate of the wild type that has all the genes present. In other words, a growth rate greater than 1 means that a given knockout line grows faster than the wild type, whereas a growth rate less than 1 means it grows more slowly. Below is the growth rate of a random sample of knockout lines:

0.79, 0.88, 0.61, 0.65, 0.86, 0.68, 0.72, 0.91, 0.97, 0.74, 0.96

What is the variance of growth rate this sample of yeast lines (answer to 6 decimals)?

Answer 1

From the given data

S.NO.	Sample 1 (X)	X^2
1	0.79	0.6241
2	0.88	0.7744
3	0.61	0.3721
4	0.65	0.4225
5	0.86	0.7396
6	0.68	0.4624
7	0.72	0.5184
8	0.91	0.8281
9	0.97	0.9409
10	0.74	0.5476
11	0.96	0.9216
Total:	8.77	7.1517