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The time needed to complete a final examination in a particular college course is normally distributed with a mean of 79 minutes and a standard deviation of 8 minutes. Answer the following questions.
a. Assume that the class has 60 students and that the examination period is 90 minutes in length. How many students do you expect will be unable to complete the exam in the allotted time (to the nearest whole number)?
Use expected collision claim amount to find out the collision insurance premium that would permit the company to break even on collision portion of policy.
a random dot stereogram is defined in wikipedia as a pair of images of random dots which when viewed with the aid of a
Test the given claim using the traditional method of hypothesis testing.
Given a p-cap of 0.16, n = 100, construct a Confidence Interval of 95%. What does the Range created mean? What happends if n changes to 10? What does the new Range mean?
To what probabilities do each of the following sigma levels correspond to, based on a standard normal curve: 3 sigma, 4sigma, 5 sigma, and 6 sigma? (Hint: Use the NORMSDIST function in Excel.
A local fast-food restaurant has determined that 10% of drive-thru orders are filled incorrectly. Suppose 5 orders are randomly selected. What is the probability that more than one of the orders is filled incorrectly?
For each of the following populations, would a score of X = 50 be considered a central score (near the middle of the distribution) or an extreme score (far out in the tail of the distribution)?
an airline reports that it has been experiencing a 17 rate of noshow on advanced reservations. among 150 advanced
A local bank reports that 80 percent of its customers maintain a checking account, 60 percent have a savings account, and 50 percent have both.
the city transit authority plans to hire 12 new bus drivers. from a group of 100 qualified applicants of whom 65 are
The critical F value with 6 numerator and 60 denominator degrees of freedom at α = .05 is:
Why do a null and alternative hypothesis have to be mutually exclusive? When would you accept the null hypothesis? Can you give an example of this?
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