1. 1.A sample of size 100selected from one population has 60successes, and a sample of size 150selected from a second population has 95successes. The test statisticfor testing the equality of the population proportions is equal to:

a.0.7293

b.-0.5319

c.-0.419

d.0.2702

question 2.Whichof the following two statements are correct?

I. The comparison of sample proportions from two independent samples relieson the z-distribution provided that the number of successes and of failures in each sample is at least 10.

II. The F distribution is the sampling distribution ofs1²/s2²that would result if two samples were repeatedly drawn from the same, normally distributed population.

a.Both I and II.

b.I but not II.

c.Neither I nor II.

d.II but not I.

questions 3.In a simple random sample of 1,000 automobile owners between ages 25-35, there were 125 owners of a Ford Explorer. If the expected number of owners of this vehicle was 142 out of 1000, the values of pi ,p, andnare, respectively:

a .142,125,1000.

b. 0.125, 0.142, 1000.

c. 0.142, 0.125, 1000.

d .125,142,1000.