1. A political poll immediately prior to a state election reveals that 145 out of 250male voters and 105 out of 200 female voters intend to vote for the Independent candidate. Can we infer at the 5% significance level that the proportions of male and female voters who intend to vote for the Independent candidate differ?
I received three data sets (the data here are fictional to preserve confidentiality, but the point is the same): In 1998, a group of companies sold 1,000 units of Product A, 500 of B, 200 of C etc, for a total of 2000 units sold for ALL 8 of a set of 8 products. In 1999, the numbers were 900 for A, 400 for B, 300 for C etc, for
A sample of scores on an examination given to both males and females in QNT 575 are: Males - 72,69,98,66,85,76,79,80,and 77 Females - 81,67,90,78,81,80, and 76 At the .01 level of significance, is the mean grade of the female students higher than that of the males? I need a step by step calculation of the problem.
One of the Rocky Mountain School District Principal's claims that each of his assistant principals makes 40 calls on parents per week. Several other Principals said that this estimate is too low and that their assistant principals make even more calls. To research the claim, a random sample of 28 assistants revealed that mean