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The GMAT scores of students who are potential applicants to a university are normally distributed with a mean of 487 and a standard deviation of 98.
a) What percentage of students will have scores exceeding 500?
b) What percentage of students will have scores between 600 and 700?
c) If the university wants only the top 75% of the students to be eligible to apply, what should be the minimum GMAT score specified for eligibility?
An instructor claims the average time to take a statistics test is more than 39 minutes. If a sample of 33 students took 43 minutes, is the instructor's claim true? Test at the 0.05 level.
The following hypothetical data demonstrate the relationship. The dependent variable is a measure of language skill at age 3 for each child. Do the data indicate any significant differences? Test with α=0.05.
he two leading United State manufacturers of high performance radial tires must set their advertising strategies for coming year. Each company has two strategies available:
There is 0.02% probability that a credit card holder of a company reports the loss or theft of the credit card each month. The company has 15,000 credit cards in Memphis. Use the Poisson distribution to answer the following questions.
Assume you are one of two manufactures of tennis balls. Both you and your competitor have zero marginal costs. Total demand for tennis balls is
Assuming the life length of batteries is normally distributed, what is the p-value associated with this test? Place your answer, rounded to 3 decimal places in the blank. For example, 0.0234 would be a legitimate entry.
Determine the solution to the given advertising decision game between Coke and Pepsi, assuming the companies act independently.
If a citizen who voted in the last election is randomly selected, what is the probability that they are a Democrat?
Suppose that the MBA education industry is constant cost and is in long run equilibrium. Demand raise, but due to strict accreditation standards, new companies are not allowed to enter the market.
You are given the information that P(A) = 0.30 and P(B) = 0.40 (a) Do you have enough information to compute P(A or B)? Explain. (Events A and B are mutually b) If you know that events A and B are mutually exclusive, do you have enough information..
The standard deviation of fresh fruit consumption is about 30 pounds. Suppose a researcher took a random sample of 38 people and had them keep a record of the fresh fruit they ate for one year.
A hypothesis test for a population proportion ρ is given below: Ho: ρ = 0.10 Ha: ρ ≠ 0.10
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