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A trial program is carried out to lower the recidivism rate of convicts (that is, the rate at which released prisoners commit additional crimes). The program selects men in county jails serving two years or less according to the first letter of their last name: prisoners with last names beginning with the letters A-M receive intense drug rehabilitation, psychotherapy (if needed) and help finding a job after their release. Prisoners with last names beginning with letters N-Z receive no additional aid.
1) Would experimental effects (such as Hawthorne effects) be a problem in this program? If so, how? Alternatively, what threats to internal validity might exist in this program?
1. provide one research hypothesis and an equation for each of the following topicsa. the amount of money
What should the average weight be if the production manager wants no more than 5% of the products to weigh more than 10 ounces and determine the probability of the sample average number of strokes being more than 5.0.
if you are interested in how well students perform on a standardized math achievement test after they have completed a
Roll a balanced 8-sided die and a balanced 6-sided die and add the spots on the up-faces. Call the sum X. What is the probability distribution of the random variable X?
Explain the difference between descriptive statistics and inferential statistics with less than 50 words? Name two graphs that can be used for describing qualitative data and two for describing quantitative data. Name one graph that can be used to ..
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.)
A citrus company is interested in evaluating the performance of two orange juice extractors, A and B. It is believed that both the size and the variety of the fruit yield in the test may influence the yields (percentage juice by weight) obtained f..
suppose that the hypotheses h0p.35 and hapgt.35 are to be tested. calculate the ovserved z-statistic for the sample
a psychology department chair notices that the average number of student complaints the department receives per week is
a sample of 24 of 172 funded projects revealed that 17 were valued at 17200 each and 7 were valued at 20480 each. from
Write a correct null and alternative hypothesis for testing the claim that the mean life of a battery for a cell phone is at least 115 hours.
A TV executive is interested in the popularity of a particular cable TV show. She has been told that a whopping 68% of American households would be interested in tuning in to a new network version of the show.
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