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Suppose the probability that a student passes a final examination in mathematics is .80, the probability that he passes a final examination in physics is .75, and the probability that he passes both finals is .60. What is the probability that the student will pass at least one of these final examinations?
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
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.
The store manager is under impression that his sales people do more business if they score higher on the social skills test which was administered this year. 5 victims were selected at random. Below, the results are X =test score, Y =weekly sales ..
Scientific poll based on 400 hospital patients has just been performed. Determine the probability that at least 70 patients will not be satisfied with after-surgery care?
There are 6 different factors labeled as A, B, C, D, E, and F. Given that D=AB, E=-AC, F=-BC, please provide the corresponding 26-3 design table. Also, please write down the complete defining relation and the complete effect alias structure.
The columns represent length of customer loyalty (in years) at a primary supermarket. The rows represent regions of the United States. What is the probability that a customer chosen at random has been loyal 10 to 14 years?
Using the .01 level, what should the researcher conclude? Solve this problem explicitly using all five steps of hypothesis testing, and illustrate your answer with a sketch showing the comparison distribution.
Find the critical t alpha/2 assuming the population is normally distributed, the confidence level is 95%, n=101 and sigma is unknown.
The standard deviation of the sample is 2.5 calls. Using the .05 significance level, can we conclude that the mean number of calls per salesperson per week is more than 44?
Find out the Expected value of the perfect information for the given problem. Given the subsiquent cost tree, illustrate what is the expected outcome.
At the 5% level of significance, can we infer that branch A has a significantly higher proportion of satisfied customers than branch B?
High levels of glucose in the blood are indications of diabetes, which is becoming more prevalent in the United States. Diabetes can lead to many complications such as blindness and heart disease. A random sample of 180 individuals had their blood su..
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