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40 observerations with a population standard deviation of 5 and a sample mean is 102. another 50 observation with a standard deviation of 6 and a sample mean of 6. conduct a hypothesis using the .05 significance level.
Identify the sampling distribution to be used: the standard normal distribution or the Student's t distribution. Find the critical value(s).
A shipment of 250 netbooks contains 3 defective units. Determine how many ways a vending maching company can buy three of these units and receive a) no defective units b) all defective units c) at least one good unit.
Affirmative action commitments by industrial organizations have led to an increase in the number of women in executive positions. Satellite Office Systems has vacancies for two executives that it will fill from among four women and six men.
Suppose a stock analyst wants to determine whether there is a difference in the mean rate of returns for three types of stock - utility, retail, and banking.
If sales invoices are automatically calculated and posted by a company's computer system, can the auditor reduce substantive tests of transactions for the accuracy objective? Why?
Find the value of k that makes f(x; y) a valid probability distribution.
Explain whether the symmetry definition of probability is appropriate with respect to the outcomes in the sample space.
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
The demand, D, on any given day is uniformly distributed over [80,140]. How many units should the retailer order to maximize expected profit?
Find a peer-reviewed article that provides an example of a study where the researchers utilized a one sample chi-square OR a two sample chi-square. Briefly describe the study and discuss its findings in your own words.
When only the value-added time is considered, the time it takes to build a laser printer is thought to be uniformly distributed between 8 and 15 hours.
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
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