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In 1987, there were 342,970 cell phone subscribers in the United States. By 2008, the number of cell phone subscribers increased to 262,438,000. What is the geometric mean annual increase for the period?
A marketing firm recently studied the number of times men and women who live alone that buy takeout dinners in a month. Two independent samples were taken one with 50 men and 55 women.
The time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes.
the national association of realtors released a survey indicating that a surprising 43 of first-time home buyers
The mean salary for engineers with less than 5 years' experience is $60,000 with a standard deviation of $5,000. Compute the z values for both 1)Rob and 2)Rachel.
How can you or your department decide whether or not the variation is important? How could using a mean difference test help?
assume that a sample is used to estimate a population proportion p. find the margin of error e that corresponds to the
the time to failure of a certain type of electrical component is assumed to follow an exponential distribution with a
Random Sample Obtain (generate) a random sample of 180 numbers between 1 and 60. You may use a calculator, excel, or a table of random numbers to achieve this. Summarize your sample into a frequency distribution with 6 classes.
Use the marginal probabilities of school quality, school cost or convenience, and other to comment on the most important reason for choosing a school.
let x be a discrete and nonnegative r.v. show thatexnbsp
a company decides to add a new program that prepares randomly selected sales personnel to increase their number of
Calculate the profit earned/loss incurred on; a high performance tire that exceeds 40,000 miles, a high performance tire that does not exceed 40,000 miles.
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