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What is a discrete random variable and how does it differ from a continuous random variable? Give examples.
What is the probability that he completed the assignments?
Formulate the hypothesis that can be used to determine whether the sample data support the hypothesis that the mean fuel efficiency rating for midsize cars is greater than the mean fuel efficiency for large cars.
At a .10 level of significance, use Stat Tools (or Excel) to test the sponsors' hypothesis. State the null and the alternative hypotheses and the decision rule. Finally, discuss your findings.
How many degrees of freedom should the researcher use in her t-test critical value assuming that the variances are equal?
The weekly demand for a product follows a normal curve with an average of 1000 units and a standard deviation of 200 units. In how many weeks during a typical 52-week year would be above 800 units?
Create a set of n observations from the binomial distribution with 1 trial and the event probability of 0.007, where n is your answer.
The mean is a useful measure, but it can be misleading. Describe a circumstance when the mean is very useful as the average and a circumstance when the mean is very misleading as the average.
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
Jim Sears manufactures farm equipment. His work requires the use of steel bars which must have a mean length of at least 50 inches. The bars can be purchased from a supplier in Kansas
The regression line yˆ2 = 3 + 2x has been fitted to the data points (4,8), (2,5), and (1,2). The residual sum of squares will be:
What are the 2 ways in which researchers assess the reliability of their measures? Be sure you understand the difference among these 2 approaches to reliability.
Given that Americans of Mexican ancestry constitute 79.1 % of the populations of those eligible for jury duty and given that Partida was convicted by a jury of 12 people with only 58% (7 jurors) of them that were Americans of Mexican ancestry, can..
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