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Question: A psychologist studying addiction tests whether cravings for cocaine and relapse are independent or related. The following table lists the observed frequencies in the small sample of people who use drugs.
(a) Conduct a chi-square test for independence at a .05 level of significance. Decide whether to retain or reject the null hypothesis.
(b) Compute effect size using and Cramer's V Hint: Both should give the same estimate of effect size.
Specify the explanatory and response variables, and explain whether confounding variables were likely to be a major problem in interpreting the results. Be sure to include the news article with your response.
Depression. A study published in the Archives of General Psychiatry in March 2001 examined the impact of depression on a patient's ability to survive cardiac.
1. if a population mean is 300 and the sample mean is 400 the difference of 100 is calleda.standard errorb.sampling
Combining all of the games played, what proportion did the Yankees win? Compute the z statistic and its P-value. What conclusion do you draw?
How does the elements below play a role in analyzing and making decisions about data (counts and/or measurements).
An article in the National Geographic News (February 24, 2005) reports that Americans are increasingly skimping on their sleep. Specify the null and alternative hypotheses
For all questions, clearly explain/show your answers. For the Analysis section, justify your answers with the appropriate graphs, statistics, equations, etc.
Translate the following arguments into symbolic notation.- If you enter the teaching profession, you will have no money for vacations; and if you do not enter the teaching profession, you will have no time for vacations.
You have Xs and Os (nine of each) in a bag near a tic-tac-toe board. You arbitrarily select an X or an O, and then you place it arbitrarily on the board.
We have a card game with 52 cards, consisJng of 4 suits (Dia, Clu, Hea, Spa), the cards are numbered Ace-10, then J,Q, K in each suit.
suppose x and y have joint density fxy e-xy for xy gt 0. find the distribution
the average tenure of technicians at abc company is 10 years with a standard deviation of 5 years. calculate the
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