Question

A confidence interval for the proportion of “blue collar” workers in a particular city who are “very concerned” about the economy is given by: .7 +/- 2.576((Squareroot)((.7)(1-.7)/200)).

Q19. The standard error of pˆ is (rounded to three decimal places) (1) .032; (2) .001; (3) .700; (4) .300; (5) .050.

Q20. A 95% confidence interval for the difference between the yearly salaries of men (group #1) and women (group #2) in a particular industry is (in thousands of dollars): 3 to 6. The confidence interval tends to support the claim that “On average, in this industry, men earn _____ thousand dollars per year more than women.” (1) more than 8; (2) less than 2; (3) more than 9; (4) less than 7; (5) None of the above choices represents a suitable response

Answer 1