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 want to test whether the variances of the two populations are equal, the test statistic will have a value of a. 1.25. b. 8. c. 1.5. d. 1.56.

b. .8

Step-by-step explanation:

We find F-test statistic for testing whether two population have equal variances.

As per given , we have

In population 1 .

Samples size :

Sample variance :

In population 2 .

Samples size :

Sample variance :

If we want to test whether the variances of the two populations are equal, then the test statistic will have a value of

Hence, the value of test-statistic = 0.8

Thus , the correct answer = b. .8

amount of oatypop that contains the prize = 40%

amount   of oatypop which doesn't contain the prize = (100-40)=60%

probability that hannah will win a prize

    = s +f s +f f s+ff   f s+ff f f s+ infinity.where f= failure,s= success

=   or 60%

probability that hannah only has to buy 3 or less boxes before getting a prize= (s) and ( f s) and (ff s) and (f f f s)

        = = 87.04 %  

step-by-step explanation:

42%

step-by-step explanation:

we know,

total people = 60

total males = 25

percentage of males

= 25/60 × 100

= 25/6 × 10

= 25/3 × 5

= 125 / 3

= 41.

rounding of = 42%

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