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Construct a contingency table of automobile origin versus overall design quality rating. Set up rows corresponding to the United States, the Pacific Rim (Japan/Korea), and Europe (Germany/Great Britain/Sweden), and set up columns corresponding to the ratings "among the best" through "the rest." Describe any apparent relationship between origin and overall design quality.
The growth of bacterial colonies follows a Poisson distribution.
A fair die is thrown 10 times. What is the probability of getting 6 in 4 throws?
Suppose Ana has a pair of dice (the traditional six-sided kind). Let X = the difference of the largest minus the smallest number showing on the dice. Find the PMF for X.
For a set of 15 data points, a computer statistical package has found the multiple regression equation to be y ^ = -23 + 20x_1+ 5x_2 + 25x_3 and has listed the t-ratio for testing the significance of each partial regression coefficient. Using the 0.0..
Regression analysis is one of the most widely used statistical techniques in the social sciences. So, what is it? In your answer, apply some of the techniques we have learned to regression -
A manufacturer claims that the life span of its tires is 47,000 miles. You work for a consumer protection agency and you are testing these tires. Assume the life spans of the tires are normally distributed. You select 100 tires at random and test the..
You take a random sample of size 100 from a normal population with unknown mean but known standard deviation 40. You plan to test H(null): mu=85 versus H(alternative): mu > 85. Your procedure will be to observe the sample then reject H(null) is xbar>..
Assume Z is a random variable with a standard normal distribution ( the is, a mean =0 and a standard deviation of 1). What is P(Z -0.5) ?
What research design was used this study
What population is described by the sampling distribution of pˆ? Suppose that we will randomly select a sample of n elements from a population and that we will compute the sample proportion pˆ of these elements that fall into a category of i..
Find the p-value for this test. Use the p-value to test H0 versus Ha by setting a equal to .10, .05, .01, and .001. What condition must be satisfied in order for the methods of this section to be appropriate?
What is the deference between a complete factorial design and an incomplete factorial design and explain the difference between a two-way AMOVA and a three-way ANOVA.
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