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A researcher studying correctional treatment on 192 sex offenders composed of 10 females and 182 males finds that 11 males along with 1 female had reoffended. He then calculates the percentages and finds that 10% of females and 6% of males had reoffended and concludes that female sex offenders were more likely toreoffendthan male sex offenders. What is wrong with his conclusion?
Assume that you plan to use a significance level of ? = .05 to test the claim that p1 =p2. Use the given sample sizes and numbers of successes to find the pooled estimate p. Round to the nearest thousandth
Let Double be the set of strings defined as {s} s= ww}. Double contains only strings composed of two identical repeated pieces. For example, if you have a vocabulary of the ten digits 0 to 9, then the following strings (and many more!) are in Dou..
the distribution of a population of mechanical aptitude test is normal with a mean of 46 and a standard deviation of 4.
question a researcher wishes to try three different techniques to lower blood pressure. subjects are randomly assigned
What statistical test should be used to analyze these data? Identify H0 and Ha for this study. Conduct the appropriate analysis.
according to the uw madison 2003-2004 factbook 11488 of the 24890 students enrolled at uw madison during that year were
Construct a 98% prediction interval for the selling price of a 4l- year old house having 4500 square feet, 13 rooms, and an attached garage.
Plot a scatter diagram of the results with Depth of Water as the independent variable.
find the standard score z such that the area above the mean and below z under the normal curve is 0.3975.find the
for boys the average number of absences in the first grade is 15 with a standard deviation of 7 for girls the average
Describe a study you might design that could use the Chi Square statistic. What are the variables? What are the null and alternative hypotheses? Why would the Chi Square test be appropriate for this design?
suppose that the mean g.p.a. of a group of high school students is 3.0 with a standard deviation of 0.3. their math sat
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