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An ophthalmologist reviews fundus photographs 30 patients wtth macular degeneration both before and 3 month after receiving a laser treatment. To assess the efficacy, of treatment, each patient is rated as improved, remained the same, or declined.
If, 20 patients improved, 7 declined, and 3 remained the same, assess whether or not patients undergoing this treatment are showing significant change from baseline to 3 months afterward. Report a p-value.
Assuming the population is large, which sample size will give the smallest standard deviation to the statistic and select the numbers for the first five to be interviewed.
Suppose you are working with a data set that is normally distributed, with a mean of 300 and a standard deviation of 44. Determine the value of x from the following information.
Small bag of Skittles candies has following assortment: red (12), blue (5), orange (15), brown (0), green (16), and yellow (7). Create the probability distribution for x.
An experiment is designed using three levels of ground clutter and two filter types. The experiment is performed by randomly selecting a treatment combination
What is the estimated standard error of the sample mean? Construct a 95 percent confidence interval for the population mean category fluency test score.
Employ the frequency distribution, which describes the response of a survey of college students when asked, "How often do you wear a seat belt when riding in a car driven by someone else?"
At the .05 significance level, is the number of units produced on the afternoon shift larger?
The company can either settle out of court for $250,000 or go to court. If the company goes to court and loses, it must pay $825,000 plus $175,000 in court costs. If it wins in court the plaintiffs pay the court costs. Identify the states of natur..
What is the probability that at most five cases of E. coli per 100,000 are reported in California this year?
Ten pairs of points yielded a correlation coefficient y of 0.79. If a=0.05, which of the following statements is correct if H 0:P=0? (Do not calculate a t-value.)
Based on past data, the Student Recreation Center knew that the proportion of students who prefer exercising outside over exercising in a gym was 0.734. To update their records, the SRC conducted a survey. Out of 95 students surveyed, 76 indicated..
A graphical presentation may accomplish ALL BUT which of the following objectives? Illustrate the amount of variation in the data.
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