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Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $30,000 and $45,000. Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired. What is the planning value for the population standard deviation (to the nearest whole number)?
How large a sample should be taken if the desired margin of error is as shown below (to the nearest whole number)?
In study of a clinical for an allergy drug 115 of the 204 subjects reported experiencing important relief from their symptoms.
1 per cent produced by Machine 2 were defective. If an item selected at random is found to be defective, what is the probability that it was produced by Machine 2.
If a correlation coefficient was calculated for n = 15, alpha = 0.01, and r = 0.85, what is the test value found using the t-test?
Part 1. What is the appropriate distribution for such data? Part 2. Is this lot anomalous?
A DVD rental store wants to know what proportions of its customers are under age 21. A simple random sample of 500 customers was taken, and 375 of them were under age 21. Presume that the true population proportion of customers under age 21 is 0.6..
1.colleges conduct student evaluations of instruction to determine if there are patterns of either excellence or the
in a shipment of 12 room air conditioners there are 3 with defective thermostats. three air conditioners will be
On opening day one season, 10 major league baseball games were played and they lasted the following numbers of minutes. Find the sample variance.
Suppose that an executive of a venture capital investment firm is trying to decide how to allocate his funds among three different projects, each of which requires a $100,000 investment.
At a = 0.05, can you reject claim that at least 52% of adults are more probable to purchase a product when there are free samples?
Given a mean score of 70, standard deviation of 15,percentile of 23.Find the Z score,T score and raw score.
A Tamiami shearing machine produced 8 percent defective pieces. The quality control engineer has been checking the output by almost continuous sampling. What is the probability that in a sample of 9 pieces:
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