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1. If after one year, the annual mileage of privately owned cars is normally distributed with mean 14,000 miles and standard deviation 3,500, what is the probability that a car has mileage greater than 20,000 miles?
2. Can small changes in the tails of a distribution result in large changes in the population mean, µ, relative to changes in the median?
(a) State null and alternative hypotheses (b) Give the test statistic and the p-value and state the conclusion of the test.
Now that you are familiar with the basic concepts of statistics, what are some examples of when you have seen or heard statistics used inappropriately?
What has the web done to the idea of copyright & intellectual property? Has it made it more complicated? Simpler? Will the web offer new opportunities for copyright holders? Or will the web destroy the concept of copyright & intellectual property ..
Telephone calls enter a college switchboard at a mean rate of 2/3 call per minute according to Poisson process. Let X denote the waiting time until the tenth call arrives. what are the moment-generating function, mean and variance of X?
a university planner is interested in determining the percentage of spring semester students who will attend summer
for a population having a mean of 10 and a variance of 30 find the probability that a sample size of 9 taken at random
In 2006 the U.S. Internal Revenue Service (IRS) received 132,275,830 individual tax returns (The 2008 New York Times Almanac). The actual number of each type of individual return received by the IRS in 2006 is given below:
What is the probability that a cereal would both high calorie and high fiber? In other words, what is P (high calorie and high fiber)?
We forecast that 20% of group 1 and 30% of group 2 will experience outcome. If we recruit the equal number of individuals in each of the groups, how many individuals do we need to study?
Enzyme immunoassay (EIA) tests are used to screen blood specimens for the presence of antibodies to HIV, the virus that causes AIDS. Antibodies indicate the presence of the virus.
A random sample of recent LSAT (Law School Admission Test) scores submitted by applicants to a university's law program are as listed below. Using the 0.10 level of significance, apply the Kolmogorov-Smirnov test for normality in examining whether..
A researcher is interested in knowing if there are differences between the incidence of accidents among male and female pilots. They were able to collect 62 responses from a random number of pilots. Among them, 17 male pilots were in accidents, 26 we..
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