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We investigate if a period of time feels longer or shorter when people are bored compared to when they are not bored. Using independent samples, we obtain these estimates of the time period (in minutes):
Sample 1 (bored): X = 14.5, s sub X super 2 = 10.22, n = 28
Sample 2 (not bored): X = 9.0, s sub X super 2 = 14.6, n = 34
(a) What are H0 and Ha? (b) Compute tobt (c) With α = .05, what is tcrit? (d) What should the researcher conclude about this relationship? (e) Compute the confidence interval for the difference between the ?s. (f) Using our two approaches, how important is
Compare the two ratios obtained in part (b). A large difference would indicate a three-term interaction or effect modification, where frequent effects are different for physicians and nurses.
a local unemployment office keeps track of the number of new claims filed each day. based on data collected it
Anonymous, the elusive hacker movement, thinks of itself as a kind of self-appointed immune system for the Internet, striking back at anyone the group perceives as an enemy of freedom, online or offl ine. Anonymous fi rst gained widespread notorie..
assume that the given procedure yields a binomial distribution with n trials and the probability of success for one
Given the following data, calculate the EMV for each investment alternative. Which is best based on the EMVs you calculated?
If a random sample of 500 third year students is taken at a city university, what is an estimate of the probability that 20 percent or less had switched majors within their first two years?
urn 1 has 5 red and 7 blue balls and urn 2 has 6 red and12 blue balls. pick 3 uniformly and randomly from each of the 2
suppose we want to determine the binomial probabilityp of getting 3 heads in 13 flips of a 2-sided coin. what values of
please provide clear explanationthe r2nbspand adjusted r2nbsptell us how much of the variation in the dependent
a. Assuming that s1 = 1.2 and s2 = 1.1, test the relevant hypotheses using a = .001. b. Compute b for the test conducted in part (a) when m1 - m2 = 6.
the average height of college basketball players is 6 feet 4inchs with a standard deviation of 4 inchs. you take a
a vending macine dispenses coffee into a twelve-ounce cup. the amount of coffee dispensed into the cup is normally
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