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In a study designed to test the effectiveness of acupuncture for treating migraine, 142 subjects were treated with acupuncture and 80 subjects were given a sham treatment. The numbers of migraine attacks for the acupuncture treatment group had a mean of 1.8 and a standard deviation of 1.4. The numbers of migraine attacks for the sham treatment group had a mean of 1.6 and a standard deviation of 1.2.
What type of error would result in that case? Respond to at least two of your classmate's postings.
What control chart(s) would you use for this data and what are the final control limits?
A. Determine the regression equation. B. Determine the estimated sales if 40 contacts are made.
Find out the marginal probability density function for the provided value. Assume that two random variables, X and Y, have bivariate pdf given by:
Testing for population proportion - evidence that the proportion of data processing clerks who have gone through the new training and are no longer employed is less than .25?
Construct a 95% confidence interval for the proportion and calculate the P value for the given test.
Could mud-wrestling be the cause of a rash contracted by University of Washington students in the spring of 1992? Two physicians at the University of Washington health center wondered this when one male and six female students complained of rashes..
At.05 level of significance determine if correlation between rental cost and apartment size is significant.
A simple random sample of 50 adults is obtained, and each person's red blood cell count (in cells per micro-liter) is measured. The sample mean is 5.23. The population standard deviation for red blood cell counts is 0.54.
Findout the normal model for the given proportions. The professor has every student toss a coin 50 times also calculated the proportion
According to a recent survey, 275 of 400 middle-aged Americans said they used the Internet regularly. 140 of 400 senior citizens said they used the Internet regularly.
Find the critical t-value that corresponds to 90% confidence. Assume 90 degrees of freedom.
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