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eev The following table contains statistics from a logistic regression analysis

ID: 3362552 • Letter: E

Question

eev The following table contains statistics from a logistic regression analysis for a study on intravenous drug use among high school students in United States. Drug use is characterized as a dichotomous variable, where 1 indicates that an individual has injected drugs within the past year and 0 that he or she has not. Factors that might be related to drug use are instruction about the HIV in school (1 represents "had HIV education" and O represents did not have HIV education"), age of the student (in years), and gender (1 represents male and 0 represents female). Statistics in the table are estimated coefficients of the logistic regression model and p-values for testing the significance of the coefficients. Choose proper answers using statistics in the following table. Variable Coefficient p-value Intercept (Constant) 0.164 0.078 HIV instruction 0.019 0.928 0.064 0.036 Gender 1.032 (There may be more than one correct answer.) D in the e nalysis above, Gender is a significant factor, at 5% level of significance, in predicting whether a student uses intravenous drugs As a student becomes older, the probability that the student has used intravenous drugs in the past year decreases Male is more likely to use intravenous drug than female students. In the analysis above, HIV education variable is a significant factor, at 5% level of significance, in predicting whether a student uses intravenous drugs

Explanation / Answer

(1) correct, as p-value=0.014 is less than level of significance=alpha=0.05=5%

(2)correct, as there is positive coefficeint

(3)correct, there is positive correlation as male=1 and female=0

(4)Incorrect, p-value=0.928 is more than alpha=0.05