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Random samples of 2009 pickup trucks with 4 cylinder, 5 cylinder, 6 cylinder, and 8 cylinder engines were obtained. Each pickup truck was tested for miles per gallons in highway driving. 4 Cylinder 5 Cylinder 6 Cylinder 8 Cylinder24 21 19 2023 21 19 1922 23 19 1924 21 18 2024 18 21 1623 22 20 1823 23 19 1524 18 20 2124 20 19 23 20 19 Is there significant evidence to show that the MPG for pickup trucks is not the same for all four engines sizes? Use α = 0.01
Construct a 90% confidence interval for the true mean weight. What sample size would be necessary to estimate the true weight with an error of plus or minus .03 grams with a 90% confidence?
In a market study for Target, a researcher found that 70% of customers are repeat customers. If 14 customers are selected at random, find the probability of getting.
Determine the point estimate and 95% confidence interval for the mean family dental expenses of all employees of the company.
It has been reported that the average US office worker receives 14 fax messages per day. For purposes of this exercise, we will assume that the daily number of fax messages is normally distributed with a standard deviation of 5.0 messages.
Describe a business situation that you have had or might face that will benefit from the use of confidence intervals?
A single box contains 12 gloves, and it has been determined that 6 percent of gloves are defective. What is the likelihood that a box of gloves gets rejected?
At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. Is this a 1 or 2 tail test?
What is the probability that the sample proportion of grocery stores selling Haagen-Dazs ice-cream, will be within 0.01 of the population proportion?
Write a short report dicussing the claim that average diastolic blood pressure in 1958 (variable dbp58) is the same for men who were alive in 1968 and for men who were not.
If you increase in the equation, would it move the graph upward? Express your answer in terms of time, initial position, initial velocity, and acceleration.
This paper is a detailed and comprehensive review of statistical research performed by others on a business related topic of the student's choice.
If you were told that on a particular day it was raining in Vancouver, what would be the probability that this day would be a winter day?
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