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Suppose the time necessary to process an application for a license plate for a newly purchased vehicle is normally distributed with mean of 6 minutes and standard deviation of 1.5 minutes. If 10 such applications are processed independently of one another, what is the probability that all takes less than 9.5 minutes?
Does the weight of a vehicle affect the gas mileage? The following random sample was collected where x = weight of a vehicle in hundreds of pounds and y = miles per gallon.
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
Explain the differences between longitudinal and cross sectional business research studies. Which two types of probability sampling are best suited for business research and statistical data analysis, and why?
A professor wants to conduct a study to know whether the grades she gives to her students affect their evaluations of her. She teaches four classes of ten students each.
A senior accounting major at Midsouth State University has job offers from four CPA firms. To explore the offers further, she asked a sample of recent trainees how many months each worked for the firm before receiving a raise in salary.
A box in a certain supply room contains four 40 w light bulbs, five 60-W bulbs, and six 75-W bulbs. If two are randomly selected from the box and at least one of them is found to be rated 75-W.what is the probability that both of them are 40- W bu..
Assuming that n = 6 for both samples, calculate each of the sample variances, then calculate the pooled variance. Because the samples are the same size, you should find that the pooled variance is exactly halfway between the two sample variances.
Determine the value of correlation coefficient between these 2 variables?
In the accompanying table, the random variable x represents the number of televisions in a household in a certain country. Determine whether or not the table is probability distribution. If it is a probability distribution, find its mean and stand..
If a 99% confidence interval is calculated to estimate the difference between the average hourly rates for each type of graduate, what is the margin of error? Assume both population standard deviations are equal.
What can be done to remedy multicollinearity? Use ANOVA instead of Regression.
Given that consumer changed te brands, what is the probability that consumer purchased fewer products than before?
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