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A professor took a sample of 194 students from her morning class and 131 in the evening class. On the 1st exam, all those sampled from the morning class got 64 while those sampled from the evening averaged to 71 with a variance of 179. If the two samples were combined
1. What is the combined exam 1 average ? (66.8215?)
2. What is the combined median for exam 1?
3. what is the shape of the combined exam 1 grade distribution?
4. What is the combined exam 1 Standard deviation?
A recent study of 75 workers found that 53 people rode the bus to work each day. Find the 95 percent confidence interval of the proportion of all workers who rode the bus to work.
the international tennis federation itf establishes the specifications for tennis balls. the diameter of a tennis ball
Utilizing the 5% level of significance as there was a significant change in cholesterol level. Their total cholesterol levels before also after the diet.
The residuals for Alaska in the original regression is above 50. Explain why it is not generally informative to judge the unusualness of an observation purely by the magnitude of its residual?
In 1,000 samples, assuming that H 0 is true, how many times would you expect to commit Type I error if:
test for single mean.according to one investigators model the data are like 400 draws made at random from a large box.
Write a proposal paper (1,250-1,500 words) for a major change project that you would like to lead.Identify a health care issue that interests you and explain why. Develop a rationale using evidence-based research, including:
Lincoln Democrats refused to accept Stephen Douglas as their presidential nominee in 1860 because he had insisted in his ______ that settlers in a territory could help keep slavery out by refusing to enact a slave code
As part of a new prevention program, a clinical psychologist wants to see whether feelings of alienation differ as a function of immigration status in a local high school.
Suppose that the probability is 1 in 3,900,000 that a single auto trip in the U.S. would result in the death of the driver. Over a lifetime, an average U.S. driver takes 50,000 trips.
High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld sound meter.
A researcher wishes to try three different techniques to lower the blood pressure of individuals with high blood pressure. The subjects are randomly selected and assigned to three groups
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