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A random sample of 100 adult workers, 60 men and 40 women, is selected in a large Midwestern city. Of the group, 42 men and 17 women are union members. Does union membership differ on the basis of gender? State the independent and dependent variables.
After careful analysis, East West has determined the following cost breakdown for the four manufacturers (in $1,000's) based on whether or not the trade bill passes:
Let 3 trails (they may not be independent), each of which is either success or not. Let X denotes number of successes. Assume E[X] = 1.8. Determine the largest possible value of P(X=3)?
A psychologist has designed a questionnaire to measure individuals' aggressiveness. Assume that the scores on the questionnaire are normally distributed with a standard deviation of 80.
A small town has a population of 20,000 people. Among these, 1,000 regularly visit a popular local bar. A sample of 100 people who visit the bar is surveyed for their annual expenditures in the bar.
Assuming that the dogs did better than what would be expected with random guessing, did they do well enough to be used for actual medical diagnoses? Why or why not?
Describe the standard normal distribution. Explain why it can be used to find probabilities for all normal distributions.
Can we compute the mean length of stay of workers at the company differs from the mean length of stay at that dangerous industry.
(a) Compute the arithmetic mean of the subscribers' incomes. (b) Compute the modal and median incomes.
Using standard methods for linear statistical prediction, find the percent increase in sales revenue that would be expected if the price were lowered by 15%. Find the usual measure of the strength of association between price reduction and sales re..
If 64 students were randomly sampled, the probability that the sample mean of the sampled students exceeds 73.5 minutes is approximately 0.
Using equation presented calculate SST,SSE and SSr. Determine least squares regression line for this data.
Three times each year, the procurement manager at Phoenix contacts National\'s marketing department to place a monthly order for each of the coming four months.
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