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Plasma-glucose levels are used to determine the presence of diabetes. Suppose the mean in (plasma glucose) concentration (mg/dL) in 35-44 year olds is 4.86 with standard deviation 0.54. A study of 100 sedentary people in this age group is planned to test if they have a higher or lower level of plasma glucose than the general population. A. If the expected difference is 0.10 in units, then what is the power of such a study if a two-sided test is to be used with α = .05? B. Answer the previous question if the expected difference is 0.20 in units. C. How many people would need to be studied to have 80% power under the assumptions in problem A?
Which of the variables below do you think will be roughly normally distributed? Please select all that apply.
A statisitcs professor plans classes so carefully that the lengths of her classes are uniformly distributed between 45.0 and 55.0 minutes. Find the probability that a given class period runs less than 50.5 minutes.
Finding the probability selecting a defective item from a collection of items using tree diagram
At 5 % level of significance, does this sample prove violation of the guideline that average patient muts pay no more than $250 out-of-pocket? Is this a close decision?
One state lottery has 500 prizes of $1, 75 prizes of $15, 15 prizes of $100, 5 prizes of $450, 2 prizes of $1225, and 1 prize of 2500. Assume that 28,000 lottery tickets are issues and sold for $1. What is the lottery's expected profit per ticket?
People were polled on how many books they read the previous year. How many subject are needed to estimate the number of books read the previous year within one book with 99% confidence?
A random sample of 12 single men were asked if they would welcome a woman asking them for a date. using the binomial probability table, find the probability that: none of the men will say yes.
Harry and Melissa Jacobson produce handcrafted furniture in a workshop on their farm. They have obtained a load of 600 board feet of birch from a neighbour and are preparation to produce round kitchen tables and ladder-back chairs during the next ..
According to T-100 Domestic Market, the top seven airlines in the United States by domestic boardings in a recent year were Southwest Airlines with 81.1 million, Delta Airlines with 79.4 million, American Airlines with 72.6 million, United Airline..
You are the manager of a fast food restaurant. You want to determine whether the population mean waiting time to place an order has changed in the past month from its previous population mean value of 4.5 minutes.
An experiment was conducted to compare the effectiveness of three training programs, A, B, and C, in training assemblers of a piece of electronic equipment.
Draw the decision tree and perform a decision tree analysis of Steeley Associates decision situation using expected monetary value and what is the value of the information provided by Bernard Consultants (EVSI)? Give a recommendation as to whether ..
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