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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.
At its meeting today, the Board decided to leave the cash rate unchanged at 2.0 per cent. The global economy is expanding at a moderate pace, with some further softening in conditions in China and east Asia of late, but stronger US growth. Key comm..
Define the term spend as it is used in business purchasing. Explain how the Internet has reduced the spend of many U.S. manufacturing companies.
What are some of the reasons why life expectancy and good health continue to increase in some parts of the world and fail to improve in others?
A) Suppose Jean Splicer, an investor, buys $100,000 of shares of stock in a diversified bundle of Bio-tech firms and exactly one year later sells those shares for $108,000. If the value of the CPI at the date of Jean's purchase was 160, and rose b..
Briefly define the term marketing mix and distinguish it from the term marketing strategy. Explain how the level of complexity of a product can affect a company's choice of communication modes.
Suppose the Environmental Protection Agency (EPA) would like to investigate the impact that octane has on gas mileage. The following table shows the gas mileage for six cars that were driven 1,000 miles with three different grades of gasoline: 87, 89..
4. The number of inaccurate gauges in a group of four is a binomial random variable s. a) What is the sample space of x (i.e., what values can s take on)? b) If on average 1 of 4 gauges tends to fail, obtain the probabilities for having one and two i..
The Comprehensive Crime Control Act of 1984 did what? What effect did United States v. Booker, 543 U.S. 220 (2005) have on the courts
Identify the types of companies that might offer a store-branded charge card. Describe the role of an acquiring bank in processing online payment transactions.
You are considering testing a new drug that is supposed to facilitate learning in mentally retarded children. Because there is relatively little known about the drug, you plan to use a nondirectional alternative hypothesis. Since your resources are l..
Produce boxplots to compare the selection times for each participant. Comment on what they reveal. Also identify (by initial) which participant took the longest and which took the shortest time to make their decisions.
In a lottery game, you pick one number from 000 to 999. If you pick one such number what is the probability that you will win the lottery?
4. Each member of a random sample of 15 business economists was asked to predict the rate of inflation for the coming year. Assume that predictions for the whole population of business economists follow a normal distribution with standard deviation 1..
The student government at a university conducted a study
The manger of a restaurant that delivers pizza to college dormitory rooms
The population proportion of Americans with diabetes is 9 percent (uc0u960 = 0.09). In repeated random samples of n = 800 Americans, 90% of sample proportions of people with diabetes would fall within______ from
Null hypothesis, an Alternate hypothesis, your work to get a t or Z value, a critical value for the test, a Decision, and if asked, a Conclusion. In order to rule on a potential federal grant, a government official must confirm that the average incom..
5. A laboratory weights filters from a coal mine to measure the amount of dust in the mine atmosphere. Repeated measurements of the weight of dust on the same filter has a standard deviation of σ = 0.08 milligram (mg) and mean 123 mg.
An initial survey was performed right after Médecins Sans Frontières accused my brother of wrong doing. Of 1852 customers, 53 were against the aggressive tactics of Médecins Sans Frontières. After my brother was cleared by the court, a follow..
Scores on a marketing exam are known to be normally distributed with mean and standard deviation of 60 and 20. a) Find the probability that a randomly selected student scores between 50 and 80. b) Find the probability that a randomly selected student..
What is the deference between a complete factorial design and an incomplete factorial design and explain the difference between a two-way AMOVA and a three-way ANOVA.
Find the test statistic.
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