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According to the U.S. Bureau of the Census Current Construction Report, the average price of a new mobile home in the western part of the United States during 1993 was $40,500. Assume the standard deviation was $8,500. Should a mobile home selling for $75,000 be considered an outlier? Explain why or why not.
The heights of 10 sixth graders are listed in inches: {53, 61, 54, 60, 58, 62, 55, 58, 59, 56}. Find the mean, median, mode, sample variance, and range.
Develop a frequency distribution table with proportions. What is an experiment? Can you describe what a Group Frequency Distribution Table is and what it looks like?
Suppose the likelihood that any flight on Northwest Airlines arrives within 15 minutes of scheduled time is .90. We choose four flights from yesterday for study.
Test the claim at alpha-.05 that the average wage has not changed by finding the p-value for the test.
A college accepted 512 of the 1,600 applicants one year, and 520 of the 1,300 applicants the next year. Can we conclude that the admissions rate was higher the second year than the first year?
Annual family dental expenses for the families of a random sample of ten employees of a company are given below. You can assume the family dental expenses for the employees of the company are normally distributed.
An additional $3,000 of net working capital will be required throughout the life of the project. What is the project's net present value if the required rate of return is 11 percent?
Formulate the appropriate null and alternative hypotheses to test the manufacturer's belief. Using the sample mean of 99.2, compute a 90% confidence interval. Show the computation, and interpret in one sentence the interval you compute.
How large a sample is needed to estimate the true proportion of covered children with 90% confidence with a confidence interval of .05.
A certain pond to check if they are significantly larger than the mean stated above. Is the mean of the sample larger population of this fish? use either L=1% or L=5%.
Does drug have significant effect on aggression? Use an alpha level of .05, two tails.
Find the best point estimate of the mean salary of all NCAA football coaches.
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