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You selected a random sample of 16 observations from a normally distributed population with an unknown population variance. The sample mean is 50 and the sample standard deviation is 12. Test the null hypothesis that the population mean is equal to 42 versus the two-sided alternative. Find the p-value for the appropriate hypothesis test.
Do women and men have different opinions about affirmative action? Based on a sub sample of 2008 GSS, the output figure below shows respondent's sex (sex) and attitudes toward affirmative action (DISCAFF: Are whites hurt by affirmative action).
a researcher computes a 2 times 4 chi-square test for independence. what are the degrees of freedom for this test?
You are running a chi-squared test. You have 2 groups with 3 characteristics each, what would your critical value be with an alpha of .025?
two researchers wiebe and bortolotti in 2002 examined the color in tail feathers of northern flickers. it sometimes
A seven year old study reported that women whose mothers used the drug DES during pregnancy were twice as likely to develop tissue abnormalities that might lead to cancer as women whose mothers did not take the the drug.
an article in the journal of composite materials vol 23 1989 p. 1200 describes the effect of delamination on the
you want to estimate the proportion of defective products that result from a new computer-aided design process that
it has been reported that 80 of all emails received is junk mail. each morning a computer user turns on his computer
A manufacturer of executive jet aircraft is concerned with its profit picture over the short run. It produces two different models of planes, x1 and x2. Its profits are $30,000 for each x1 and $20,000 for each x2. There are two major constraints o..
Determine the amplitude of the secondary field of the subsurface conductor and the amplitude of its real and imaginary components. What do the obtained results reveal about the nature of the conductor?
a fish tank in a pet store has 23 fish in it. 8 are orange and 15 are white. determine the probability that if we
Some television stations attempt to gauge public opinions by posing a question on the air and asking viewers to call to give their opinions.
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