Questions from Applied Statistics

Q: Find the mean, standard deviation, and coefficient of variation for

Find the mean, standard deviation, and coefficient of variation for X = 5, 10, 20, 10, 15.

Q: Five students in a large lecture class compared their scores on two

Five students in a large lecture class compared their scores on two exams. “Looks like the class mean was higher on the second exam,” Bob said. (a). What kind of...

Q: A consulting firm used a random sample of 12 CIOs (chief

A consulting firm used a random sample of 12 CIOs (chief information officers) of large businesses to examine the relationship (if any) between salary (in thousands) and years of service in the firm....

Q: Which of the following Excel formulas would be a correct way to

Which of the following Excel formulas would be a correct way to calculate P(X < 450) given that X is N(500, 60)? a. =NORM.DIST(450, 500, 60, 1) b. =NORM.S.DIST(450, 60) c. =1–NORM.DIST(450, 500, 60,...

Q: In a random sample of 200 Colorado residents, 150 had skied

In a random sample of 200 Colorado residents, 150 had skied at least once last winter. A similar sample of 200 Utah residents revealed that 140 had skied at least once last winter. At α = .025, is the...

Q: Which statement is correct concerning the normal approximation? Why not the

Which statement is correct concerning the normal approximation? Why not the others? a. The normal Poisson approximation is acceptable when λ > 10. b. The normal binomial approximation is better when n...

Q: For the following contingency table, find (a) P (

For the following contingency table, find (a) P (H ∩ T); (b) P (S | G); (c) P(S)

Q: Given n1 = 8, s1 = 14, n2 = 12

Given n1 = 8, s1 = 14, n2 = 12, s2 = 7. (a). Find the test statistic for a test for equal population variances. (b). At α = .05 in a two-tailed test, state the critical value and degrees of freedom....

Q: Given H0: μ > 18 and H1: μ < 18

Given H0: μ > 18 and H1: μ < 18, we would commit Type I error if we a. conclude that μ > 18 when the truth is that μ < 18. b. conclude that μ < 18 when the truth is that μ > 18. c. fail to reject μ >...

Q: The process that produces Sonora Bars (a type of candy)

The process that produces Sonora Bars (a type of candy) is intended to produce bars with a mean weight of 56 grams (g). The process standard deviation is known to be 0.77 g. A random sample of 49 cand...