Asample of 60 items from population 1 has a sample variance of 8 while a sample of 40 items from population 2 has a sample variance of 10. if we test whether the variances of the two populations are equal, the test statistic will have a value of

a. 0.8

b. 1.56

c. 1.5

d. 1.25

 a. 0.8

Step-by-step explanation:

When we test whether the variances of the two populations are equal we use F- test.

Test statistic :

, where = sample variance from population 1.

= sample variance from population 2.

As per given , we have

and  

Then,  If we test whether the variances of the two populations are equal, the test statistic will be

Hence, the test statistic will have a value of 0.8 .

Thus , the correct answer is  a. 0.8 .

his chances of getting a coin of higher value is 4/19

step-by-step explanation:

0.6, 3/5, and 6% are the 3 same portion.

but, when they're all changed to a decimal they would equal to 0.6.

hope this , good luck!