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Sleep deprivation and reaction times. Sleep deprivation experienced by physicians during residency training and the possible negative consequences are of concern to many in the health care community. One study of 33 resident anesthesiologists compared their changes from baseline in reaction times on four tasks.5 Under baseline conditions, the physicians reported getting an average of 7.04 hours of sleep. While on duty, however, the average was 1.66 hours. For each of the tasks the researchers reported a statistically signi?cant increase in the reaction time when the residents were working in a state of sleep deprivation.
(a) If each task is analyzed separately as the researchers did in their report, what is the appropriate statistical method to use? Explain your answer.
(b) Is it appropriate to use a one-way ANOVA with I = 4 to analyze these data? Explain why or why not. a 10-point scale with 1 indicating total lack of importance and 10 indicating very high importance. The following table summarizes these results:
Class
Freshman
n
724
Mean score
7.6
Sophomore
536
Junior
593
7.5
Senior
437
7.3
(a) To compare the mean scores across classes, what are the degrees of freedom for the ANOVA F statistic?
(b) The MSG = 11.806. If sp = 2.16, what is the F statistic?
(c) Give an approximate (from a table) or exact (from software) P-value. What do you conclude?
a new production technology for making vitamins is invented by a college professor who decides not to patent it. thus
kinesiology
Explain the change in the infant mortality rate (IMR) in the United States since 1960
A firm with market power produces widgets at marginal cost of $10 per unit and zero fixed costs. It faces demand function given by P = 50 - Q. Find out the marginal revenue for the firm?
Consider a sharecropper whose contract calls for him to receive ¾ of the output produced in the farm on which he works. Suppose that the value of the marginal product of labor on the shared cropped land is given by 80-L. Where L stands for hours o..
1. Mia Dribble has a utility function u=W^(2/3). Mia is a basketball star starting her senior year. If she makes it through her senior year without a serious injury, she will receive a $8,000,000 contract for playing in the new professional women's b..
College Financial Sources, which makes small loans to college students, offers to lend $500. The borrower is required to pay $40 at the end of each week for 16 weeks. Find the interest rate per week. What is the nominal interest rate per year
The following data is presented on two mutually exclusive projects under consideration by the XYZ Company: Compute the following values for each project using the time value tables and Microsoft Excel.
Propose a regression model including the important explanatory variables that a business manager should use in estimating the demand for its product.
What phase of the business cycle was Italy going through in 2012? Refer to the above sources and economic theory in your answer and demonstrate the phase of the business cycle using an aggregate demand and supply model.
What were the views of Keynes and Friedman on the exogeneity or endogeneity of the money supply? What justi?es their views? What were the views of Wicksell on the exogeneity or endogeneity of the money supply? What justi?es his views?
1. Has Dr. Frederick done anything wrong in giving Sandra this assignment?
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