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A survey of magazine subscribers showed that 55.8% rented a car during the last 12 months for business reasons, 44% rented a car for personal reasons, and 25% rented a car for both business and personal reasons.
a. What is the probability that a subscriber rented a car for personal or business reasons?
b. What is the probability that a subscriber rented did not rent a car for either personal or business reasons?
Express the null hypothesis and the alternative hypothesis in symbolic form: An entomologist writes an article in a scientific journal, which claims that fewer than 7 in ten thousand male fireflies are unable to produce light due to a genetic muta..
See if there is a difference in their means and variances.
Probability based on normal distribution. Suppose among X has a normal distribution, and find the indicated probability.
After calculating the sample size needed to estimate a population proportion to within 0.04, your statistics professor told you the maximum allowable error must be reduced to just .01. If the original calculation led to a sample size of 800, the s..
According to the National Football League, the average salary for players for the 2010 season was about $1.9 million while the median salary is around $770,000. Why are both numbers reported? What might the difference between the two statistics me..
What if the assumption E[u/x]=0 is not satisfied? Illustrate using an example. Explain the relationship represented by a population regression function.
The Swansons are planning to fly to Hawaii from Toronto with a stopover in Los Angeles. There are five flights they can take between Toronto and Los Angeles and ten flights between Los Angeles and Hawaii.
What is the optimal strategy for producing 500 tons of newsprint pulp, 600 tons of packaging pulp, and 300 tons of print stock quality pulp at minimum cost?
In order not to violate the requirements necessary to use the chi-square distribution, each expected frequency in a goodness of fit test must be:
Many newspapers carry a certain puzzle in which the individual must unscramble letters to form words. How many ways can the letters of YARNLE be arranged?
The 95% prediction interval for a new patient with a 2-day cholesterol level of 220 is
In a batch of 8,000 clock radios 9% are defective. A sample of 15 clock radios is randomly selected without replacement from the 8,000 and tested.
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