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The symphony sells raffle tickets each year to raise money. Assume they sell 2000 tickets and the tickets cost $100 each. The top prize is a $50,000 car and the second prize is a $5,000 gift certificate from jewelry store and the third prize is a $1,000 shopping spree at an area mall. Find the expected value of buying a raffle ticket.
The manager of Sandy Corporation wants to determine whether or not the type of work schedule for her employees has any effect on their productivity. She has selected 15 production employees at random and then randomly assigned 5 employees to each ..
When the conditionally and unconditionally expected values of a discrete random variable would be different?
Florida State University administers a test of mathematics placement to students when they first enter the university.
Create a 90% confidence interval for mean score on this placement exam for all students.
They are thinking of introducing a new flavour, maple-marshmallow Frumpies, and want to know whether children will prefer the new flavour to the old one. Design a completely randomized experiment to investigate this question.
In comparing two variances below, determine test value and what are degrees of freedom that must be used?
Sample size of only 20. Find out a 95% confidence level for population Cp.
Make three-month and four-month moving averages for this time series. Does the three-month or four month moving average provide the better forecast? Explain.
They were planted in four different locations, so we will consider the field as a second factor because different soil and moisture types can also have an effect on yield. The interaction plot below was obtained.
What is the null hypothesis? Use a = 0.05 .
what are the probability of you having the disease?
Testing for population mean - How would this information be useful to you if you were the college register?
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