US department of labor wanted to compare the average unemployment rate in two different states California and Washington. From California they took a sample of size 25 and found that sample mean 20.32 and sample standard deviation is 3.55.From Washington they took a sample of size 45 and found that sample mean 21.24 and sample standard deviation is 2.70. Calculate the pooled variance.

Question 9 options:

7.94

5.27

3

2.818

9.86