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Is the difference significant? Tom wonders if two-bedroom apartments rent for significantly more than one-bedroom apartments. Use the data in the previous exercise to find out.
(a) State appropriate null and alternative hypotheses.(b) Report the test statistic, its degrees of freedom, and the P-value. What do you conclude?(c) Can you conclude that every one-bedroom apartment costs less than every two-bedroom apartment?(d) In the previous exercise you found a confidence interval. In this exercise you performed a significance test. Which do you think is more useful to someone planning to rent an apartment? Why?
On the same chart, produce a graph showing the original probability mass function, and a line graph showing your selected continuous probability density function.
What would you predict the price per share to be if 95 million shares were offered?
Explain why it makes sense for a set of data to have a correlation coefficient of zero when the data show a very definite pattern.
For machine gun ammunition to be acceptable, the US Army requires that 96 percent of rounds fired hit a specified target. The test is to fire a 50 round burst at the target and observe whether this condition is met.
If a student is randomly selected what is the possibility that the student is male and from out of state.
Judging from recent experience, 5 percent of the computer keyboards produced by an automatic, high-speed machine are defective
An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining that the mean out-of-pocket patient billing above the reimbursed amount was $275.66 with a standard deviation of $78.11.
The Rutter Nursery Company packages pine bark in 50-pond bags. From a long history, the packaging department reports that the distribution is normal. At the end of each day Jeff Rutter
A large discount chain compares the performance of its credit managers in Ohio and Illinois by comparing the mean dollar amounts owed by customers with delinquent charge accounts in these two states.
Suppose the random variable x is best described by a normal distribution with µ = 24 and σ = 2.7. Find the z-score that corresponds to each of the following x values.
Using Binomial approximation, find the proportion of the days that will be rejected.
An insurance representative wants to determine if the proportions of women and men who buy the different policy types are the same. The actual sales results for 50 women and 50 men are
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