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A psychologist studying addiction tests whether cravings for cocaine and relapse are independent. The following table lists the observed frequencies in the small sample of people who use drugs. Obs. Freq. Relapse Yes No Cravings Yes 21, 10, 31, No 9, 14, 23 30, 24, N = 54
(a) Conduct a chi-square test for independence at a 0.05 level of significance. (Round your answer to two decimal places.)
=
Decide whether to retain or reject the null hypothesis.
Retain the null hypothesis.
Reject the null hypothesis.
(b) Compute effect size using ?? and Cramer's V. Hint: Both should give the same estimate of effect size. (If necessary, round your intermediate steps to two or more decimal places. Round your answers to two decimal places.)
??=
V=
What does this tell us about the person's (a) heart rate, (b) systolic and diastolic blood pressure?
in a combined study of northern pike cutthroat trout rainbow trout and lake trout it was found that 26 out of 855 fish
a researcher is performing a two-way anova using two factors. the first factor has 5 levels and the second factor has 6
you are told that the population of the scores of iq test takers is normally distributed has a population mean of 100
Four research participants take a test of manual dexterity (high scores mean better dexterity) and an anxiety test (high scores mean more anxiety). The scores are as follows.
Let S be a random variable (not necessarily positive). Prove using Markov's inequality that for every p>0 and for every constant q,
At times we can generate a regression equation to explain outcomes. For example, an employee's salary can often be explained by their pay grade, appraisal rating, education level, etc.
Open the divorce.sav data file and run the one-way ANOVA to answer the following questions: What are the effects of marital status on life satisfaction? State the independent and dependent variables
This result prompts a test administrator to claim that standard deviation for eighth graders on examination is less than 29.At a = 0.10, is there sufficient evidence to support administrator's claim?
You are testing the null hypothesis that there is no linear relationship between two variables, X and Y. From your sample of n=10, you determine that r=0.80.
(a) What is the probability that the number of jacks in our hand equals 2?
Find the mean and the standard deviation of the number of correct answers.
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