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The paint department has been given the assignment of designing color codes for 42 different parts. There are a total of seven colors available. Three colors are to be used on each part. A combination of three colors used for one part cannot be rearranged and used to identify a different part. This means that if green, yellow, and red were used to identify a cam shaft, red, green and yellow (or any combination of these three colors) could not be used to identify another part. How many parts can the paint department code?
State the null hypothesis and alternative hypothesis. Indicate the type of test to be performed (left-tailed, right-tailed, or two tailed). Provide a statement in terms of the hypothesis testing process in this problem that would signify a Type I ..
Random sample of workers at each of three plants. Research question: Are the mean hourly productivity levels the same for workers in these three plants?
Determine a 95% confidence interval for the population mean.
A student is selected at random and found to have a GPA of less than 2.5, what is the probability that the student is from a private school?
Using a significance level of 0.03, carry out a hypothesis test to determine if there is convincing evidence to support the claim that fewer than half of adult Americans can name at least one justice currently serving on the Supreme Court.
If the p value for a test for difference of educational level of two groups is p=0.0184, is the difference statistically significant at the 0.01 level?
Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
(a) State the hypothesis for a right-tailed test. (b) Obtain a test statistic and p-value assuming equal variances. Interpret these results. (c) Is the difference in mean scores large enough to be important?
A tire company test a particular model of tire and found the tires to be normally distributed with respect to wear. The mean was 28,000 miles and the standard deviation was 2500 miles. If 2000 tires are tested, about how many are likely to wear ou..
From time to time, one branch office of a company must make shipments to a certain branch office in another state. There are three package delivery services between the two cities where the branch offices are located.
Suppose a recent poll of 1,000 people sets forth that 51% of Americans support the U.S. government's "War on Drugs." This poll is shown to have a margin of error of 2%.
The State Transportation Department is interested in estimating the proportion of vehicle owners that are operating vehicles without the required liability insurance.
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