Questions from Applied Statistics

Q: Find the critical value of Student’s t for each hypothesis test.

Find the critical value of Student’s t for each hypothesis test. a. Two-tailed test, n = 18, a = .05 b. Right-tailed test, n = 15, a = .10 c. Left-tailed test, n = 31, a = .01

Q: Find the tcalc test statistic for each hypothesis test. A

Find the tcalc test statistic for each hypothesis test. A. x bar = 347, μ0 = 349, s = 1.8, n = 9 B. x bar = 45, μ0 = 50, s = 12, n = 16 C. x bar = 4.103, μ0 = 4.004, s = 0.245, n = 25

Q: Find the p-value using Excel (not Appendix D):

Find the p-value using Excel (not Appendix D): a. t = 1.457, d.f. = 14, right-tailed test b. t = 2.601, d.f. = 8, two-tailed test c. t = 21.847, d.f. = 22, left-tailed test

Q: Use Excel to find the p-value for each test statistic

Use Excel to find the p-value for each test statistic. a. Right-tailed test, t = 11.677, n = 13 b. Left-tailed test, t = 22.107, n = 5 c. Two-tailed test, t = 21.865, n = 34

Q: The manufacturer of an airport baggage scanning machine claims it can handle

The manufacturer of an airport baggage scanning machine claims it can handle an average of 530 bags per hour. At α = .05 in a left-tailed test, would a sample of 16 randomly chosen hours with a mean o...

Q: According to J.D. Power & Associates, the mean

According to J.D. Power & Associates, the mean purchase price of a smartphone device (such as an iPhone or Blackberry) in 2008 was $216. In 2009, a random sample of 20 business managers who owned a sm...

Q: The number of entrees purchased in a single order at a Noodles

The number of entrees purchased in a single order at a Noodles & Company restaurant has had an historical average of 1.60 entrees per order. On a particular Saturday afternoon, a random sample of 40 N...

Q: In 2008, a small dealership leased 21 Suburu Outbacks on 2

In 2008, a small dealership leased 21 Suburu Outbacks on 2-year leases. When the cars were returned in 2010, the mileage was recorded (see below). Is the dealer’s mean significantly...

Q: Calculate the test statistic and p-value for each sample.

Calculate the test statistic and p-value for each sample. A. H0: π = .20 versus H1: π ≠ .20, α 5 .025, p = .28, n = 100 B. H0: π < .50 versus H1: π > .50, α 5 .025, p = .60, n = 90 C. H0: π < .75 vers...

Q: May normality of the sample proportion p be assumed? Show your

May normality of the sample proportion p be assumed? Show your work. a. H0: π = .30 versus H1: π ≠ .30, n = 20 b. H0: π = .05 versus H1: π ≠ .05, n = 50 c. H0: π = .10 versus H1: π ≠ .10, n = 400