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Assume a logisitc regression model includes a continuous variable like age and a categorical variable like gender and an interaction term for these. If the P value for any of the main effects helpful in determining whether (a) the interaction is significant, (b) whether the main effect should be included in the model? (c) Would your answers to (a) or (b) change if the categorical variable were RACE with three categories?
Calculate the standard deviation of the sample mean for samples of size 1, 4, 25, 100, 250, 500, 1000, and 5000. Graph your results with the sample size on the x axis and the standard deviation on the y axis.
Is the study result statistically significant? Write a sentence that interprets the p value of 0.03 in relation to the study results. Use 0.03 in your sentence.
We can use two products at my work, which are mutual funds and see if there is a correlation between the two. The two different funds are: a domestic stock mutual fund, which only invests in large organizations (large cap companies) based here in..
Consulting team. You work for a large global management consulting company. Of the entire work force of ana- lysts, 55% have had no experience in the telecommunicationsindustry, 32% have had limited experience (less than 5 years), and the rest hav..
question given the following analysis of variance table for three treatments each with six
Health authorities in Savannah, GA reported that 22 injuries requiring hospitalization occurred in the city of 65,000 during St. Patrick's Day celebrations.. What was the prevalence rate of injuries requiring hospitalization on the holiday and fo..
1) A sample of 9 paired observations generates the following data: d(bar) = 1.61 and S^2d= 2.88 a) Construct 95% confidence interval for the mean difference Ud.
Perform an appropriate hypothesis test, showing the necessary calculations and/or explaining the process used to obtain the results.
A random sample of 90 observations produced a mean 25.9 and a standard deviation 2.7. Find an approximate 95% confidence interval for the population mean
you calcuate the chi-square test statistic in a test of independence and determined that xsup2 -4.23 with 10 degrees
1. What is a business plan, for whom is it prepared, and why? 2. What should a complete business plan include?
Only two doctors would make a diagnosis on patients coming into the same STD clinic for gonorrhea. The probability of the two doctors making a diagnosis of gonorrhea is (independent, dependent, synergistic, cannot tell).
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