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A small pilot study is run to compare a new drug for chronic pain to one that is currently available. Participants are randomly assigned to receive either the new drug or the currently available drug and report improvement in pain on a 5-point ordinal scale: 1=Pain is much worse, 2=Pain is slightly worse, 3= No change, 4=Pain improved slightly, 5=Pain much improved. Is there a significant difference in self-reported improvement in pain? Use the Mann-Whitney U test with a 5% level of significance. Please show work.
New Drug: 4 5 3 3 4 2
Standard Drug: 2 3 4 1 2 3
The Human Relations Department of Electronics Inc. would like to include a dental plan as part of the benefits package. The question is: How much does a typical employee and his or her family spend per year on dental expenses?
Madison Metals recently reported $9,000 of sales, $6,000 of operating costs other than depreciation, and $1,500 of depreciation. The company had no amortization charges and no non-operating income.
The chance of selling any one property is independent of selling another property. Compute the probability of selling at least 4 properties in one week.
at mikes auto service the mean time to diagnose a problem is 30 minutes with a standard deviation of 8 minutes. the
a random sample of medical files is used to estimate the proportion p of all people who have blood type b.a if you have
to provide information on whether coatings on iron pipes are of any use 10 pieces of pipe are each marked off in equal
In a study of 10 graduate students from a nurse education program, the average age of the group was 48.6 years and the standard deviation was 4.1 years. Assume the variable is normally distributed. Find the 95% confidence interval of the true mean..
Two events are mutually exclusive: If their intersection is 1, If they have no sample points in common.
which of the following would be an example of a design that examines the effects gender and school type i.e. elementary
What does the * represent in a boxplot? How many * are there for the variable Book Cost? What are the outlier values? What is the 5-number summary for Book Cost?
the distribution of brood size x number of young in a nest of a certain species of bird is given as followsbrood sizexp
In a recent year Barry Bonds hit 73 home runs in the 153 games he played. Assume that his home run production stayed at that level the following season.
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