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A toll bridge charges $1.00 for passenger cars and $2.75 for other vehicles. Suppose that during daytime hours, 60% of all vehicles are passenger cars. If 15 vehicles cross the bridge during a particular daytime period, what is the resulting expected toll revenue? [Hint: Let X = the number of passenger cars; then the toll revenue h(X) is a linear function of X.]
a sample of n 7 scores has a mean of m 9. one score in the sample is changed from x 19 to x 5. what is the value
A researcher was interested in determining whether incentives affect the response rate in surveys. A simple random sample of 50 adult residents of a large city was selected. All were mailed a survey and promised a check upon returning a completed ..
Compute a Pearson's correlation coefficient for these data and determine whether the correlation is significant.
the proportion of credit-card holders who pay their bill in full each month is 20 the other 80 make only a partial or
What are the null and alternative hypotheses to test if the new battery has longer life than the old battery? Draw a conclusion for the hypothesis test. Make sure you state your conclusion in the context of the problem.
Binomial distribution for large values of the number of trials, n. Suppose that Y has a binomial distribution with n trials and probability of success on any one trial denoted by p. How we can obtain P (Y B)?
Explain how much money do these people make each year. Suppose you read in your local newspaper that 45 officials in student services whioch is earned as an average.
consider two urns. the first contains two white and seven black balls and the second contains five white and six black
The time to complete a construction project is normally distributed with a mean of 60 weeks and a standard deviation of 4 weeks. What is the probability the project will take longer than 65 weeks?
in a recent new york city marathon 25221 men finished and 253 dropped out. also 12883 women finished and 163 dropped
What is the probability that a respondent said neither the Big Ten nor the Pac-10 will have a team in the Rose Bowl?
State the Null and Alternative Hypotheses. Determine the test statistic. Determine and interpret the p-value
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