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Commute times: three random samples of time in minutes that commuters are stuck in traffic are shown. At anova =0.05, is there a difference in the mean times among the three cities? What factor might have influenced the results of the study? Show work
Dallas Boston Detroit
59 54 53
62 52 56
58 55 54
63 58 49
61 53 52
For the following cases, determine whether the sampling is dependent or independent. Explain your conclusion.
For each of the following situations, indicate the appropriate measure, incidence rate or prevalence rate and the numerical value of the rate.
Two mating parts have critical dimensions x1 and x2 as shown below. Assume that x1 and x2 are normally distributed with means 1 and mean2 and standard deviations s1 = 0.400 and s2 = 0.300.
Utilizing Excel data analysis calculate t distribution also deduce the result. Study of variance is used to investigate if there is a difference in the mean mileage of the three cars.
What sample size must you take to be 96% confident that the results will be within $.75 of the true mean cost per call?
The mean of a standard normal probability distribution.
A customer from Cavallaro's Fruit Stand picks a sample of 5 oranges at random from a crate containing 80 oranges, of which 6 are rotten. What is the probability that the sample contains 1 or more rotten oranges? (Round your answer to three decimal..
Develop a 90 percent confidence interval for the proportion of applicants that fail the test. (Round your answers to 2 decimal places.)
A roulette wheel has 38 slots, numbered 0, 00, and 1 to 36. The slots 0 and 00 are colored green, 18 of the others are red, and 18 are black.
Identify a research question from your professional life, research interests, or everyday experience that could be addressed by this analysis.
Calculate the appropriate test statistic to test the hypotheses related to the concern and test at 5% and 1% (indicate which test you are performing; show the hypotheses, the test statistic and the critical values and mention whether one-tailed or..
What are the two ways of testing a correlation coefficient for significance?
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