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A logistic regression model was used to assess the association between CVD and obesity. P is defined to be the probability that the people have CVD.
log(P/(1-P)) = -2 + 0.7(obesity)
What is the odds ratio for CVD in persons who are obese as compared to not obese?
What is the probability that no more than two of the three are commercial successes?
What is the equation for this regression model?
Average performance evaluation is higher for managers hired from outside firm compared with those promoted from within? What other stories does this graph tell?
You might find the probabilities using the Table or software of your choice. Please explain how you obtained your results.
Explain the terms parameter and statistics. Make sure the concepts of population and sample are included in the definitions.
A local politician in this town has stated that the average property taxes are $1800 and most people do not pay more than this amount. Conduct a test at the alpha = .01 level to determine if this is true. For this test, consider a sample size of 3..
An accounting firm is planning for the next tax preparation season. From last year's returns, the firm collects a systematic random sample of 100 filings.
How large sample should be selected in order to obtain p estimate with a bound of 0.08 on the error of estimation.
Two independent samples of sizes 16 and 26 were taken. In a test of equality of population means of the two samples, how many degrees of freedom are associated with the critical t-value?
Estimate with 95% confidence the mean reduction in time it takes for someone who has taken the sleeping pill to fall asleep.
Calculate a 92% confidence interval for the mean density of quartz porphyry, given that 75 samples yield mean of 2.62 grams per cubic centimeter
Using a significance level of 0.05, can we conclude from this information that the course is successful in improving individuals' knowledge of Web page design?
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