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A large state university sends recruiters throughout the state to recruit graduating high school seniors to enroll in the university.
University records show that 25% of the students who are interviewed by the recruiters actually enroll. If last spring the university recruiters interviewed 1,889 graduating seniors, what is the probability that at least 500 of them will enroll this fall?
It is reasonable to model their weights as independent random variables, find the probability that 100 packages will have a total weight exceeding 1700 lb.
A shoe company checks police records on 1200 randomly selected auto accidents and notes that teenagers were at the wheel in 180 of them. Construct a 90% confidence interval estimate of the proportion of shoe accidents that involve teenagers.
a distribution of scores has mu 40 and sigma 18a. describe the distribution of sample means based on samples of n36
The amount of money spent on lunches. The variance of nine business dinners was $6.12 and the variance of 12 business lunches was $0.87. What is the test value?
A sample of 8 applications are randomly taken and these were processed in 7, 6, 7, 9, 3, 3, 8 and 5 days. Assuming that the processing time is normally distributed, test the validity of the officer's claim at 0.01 level of significance.
A statistician will be asked to help solve real-world problems by designing a study, collecting data, analyzing the data, and writing up the results. As a final project, you will be asked to do something similar. Though the design and data collect..
a spice rack contains three jars of herbs and four jars of spices. if the jars are placed randomly on the rack what is
Joe wants to sell his car. He receives one offer each month and must decide immediately whether to accept the offer. Once rejected, the offer is lost. The possible offers are $600, $800, and $1,000, made with probabilities 5/8, ¼ and 1/8 respectiv..
The time spent waiting for a heart transplant in Ohio and MIchigan for patients with A+ blood can be approximated by a normal distribution with a mean of 127 days and a standard deviation of 23.5 days. What is the longest time spent waiting for a ..
It is believed that the range of hourly wages paid to auto mechanics in a large city is $9 (range approx. = 4sigma-squared). If we assume that hourly wages are approximately normally distributed,
In an experiment with two independent variables, an ANOVA partitions the total variance into four components. What are they?
Estimate the average wear and its variance. Based on this sample, how many clutch plates out of a large set will be expected to show wear of more than 203 mm?
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