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2. Researchers conducting a clinical trial randomly assigned 60 patients with painful kneeosteoarthritis evenly into one of four treatment groups: glucosamine, chondroitin, Celebrex, orplacebo. After the study period, patients were asked if they experienced substantialimprovement in pain and ability to function normally. Thirty-four patients replied that they didhave an improvement, including 8 in the glucosamine group, 9 in the chondroitin group, 11 inthe Celebrex group, and 6 in the placebo group.
a. Create a graph for this data that can be used to compare the success of each of the fourtreatments. (4pt)
b. Conduct the appropriate test to determine if these four treatments were equally successful inimproving knee pain and functionality. (5pt)
c. Calculate the odds ratio of experiencing an improvement for patients in the Celebrex groupcompared those in the placebo group. Interpret what this means in the context of theproblem.
Which of the following is NOT a point estimate?
Calculate the mean and standard deviation of # of sales people (x) and sales (y). Find sample size n - Calculate the correlation coefficient with all three methods (covariance method, z-score method, and correlation tool in Excel).
12) The time it takes to process phone orders in a small florist/gift shop is normallydistributed with a mean of 6 minutes and a standard deviation of 1.24 minutes.a. What cutoff value would separate the 2.5% of orders that take the most time ..
The population characteristics of two random variables
The manager of a furniture company has collected data on the amount of money spent on advertising and sales revenue for the last ten months. The data is as follows
Construct the 95% confidence interval estimate of the mean number of migraine attacks for those treated with acupuncture.
Calculate the ANOVA table for the model, which you have determined. What is the estimate of the variance in the electric power measurement?
A business man must travel to five different destinations
Would there be a possibility to use the correlation coefficient to identify collocations and Compare with the Chi2 test and How could we maybe do that
What is the preventive maintenance cost that makes the manager indifferent between a one week and a two week preventive maintenance strategy?
Confidence interval for the true proportion of the stores that violate the standard were not met. Determine the number of stores that must be sampled in order to estimate the true proportion to within 0.05 with 95% confidence using the large-sa..
Using the information from part by hand, calculate a 90 confidence interval for the difference of the means for the two time periods.
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