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A large firm has 85% of its service calls made by a contractor, and 10 of these calls result in customer complaints. The other 15% of the service calls are made by their own employees, and these calls have a 5% complaint rate. Find the:
a) Probabiltiy of receiving a complaint
b) Probability that the complaint was from a customer serviced by the contractor
The moment generating function of normal distributed random variable ,Y, with mean and variance .derive the moment generating function of X=-3Y+4.what is the distribution of X? why?
Under what conditions should you use the McNemar test? Under what conditions should you use the Kruskal-Wallis rank test?
26% of college students say they use credit card because of the rewards program . You randomly select 10 college students and ask each to name the reason he or she uses credit cards.
Calculate the population mean margin of error for a 90% confidence interval when sigma is 4 and sample size is 36. Standard IQ test has mean of 98 and standard deviation of 16.
To market a new white wine, a winemaker decides to use two different advertising agencies one operating in the East and one in the West. After the white wine has been on the market for 8 months, independent random samples of wine drinkers are take..
bob looks in the classified ads for rents on one-bedroom and two-bedroom apartments. he writes down the figures for 10
The manufacturer would like to establish Inventory levels such that there is only a 5% chance of running out of stock. Where the Manufacturer should set the inventory levels?
What is a "Chi-Squared Test"? Provide a fully referenced explanation and provide a brief example on a Chi-squared test, fully referencing all sources of information.
a linear regression was done to relate systolic blood pressure to weight measured in pounds. the resulting regression
should you use a binomial distribution? please give a reason for your answer. in a random sample of students x is the
Expression used to compute an interval estimate of m may depend on any of the following factors except and expected value of the random variable
Does it seem to you that people tend to be absent more on some days of the week than on others?
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