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Let's suppose that we have 2 variables year and age.. I use STATA to make them into dummy variables as follows:
tabulate YEAR, generate(dum)
tabulate AGE, gen (dum)
Now, my question is....how can I make interactions for all of the dummy variables?
Find the standard error of the difference in sample means,
A manager of a small store wanted to discourage shoplifters by putting signs around the store saying "Shoplifting is a crime!" However, he wanted to make sure this would not result in customers buying less.
Find out best decision, by using following decision criteria.
Hypothesis test for one population mean - What is the alternative hypothesis and What is the null hypothesis?
Assuming that the dogs did better than what would be expected with random guessing, did they do well enough to be used for actual medical diagnoses? Why or why not?
When investigating the distribution of a data set, which is more effective: a frequency distribution or a histogram? Why?
University of Waterloo are much susceptible to hypnosis which University of Tennessee undergraduates. Set up H0 and Ha for the test.
Develop a joint probability table for these data. If a student goes full time, determine the probability that school quality is first reason for selecting a school?
Not take SRS of 25 students who took test. What are the mean and standard deviation of sample mean score xbar of these 25 students?
Determine the average and the variation for Brand 1 price, sales market share, and total revenue, using the weekly market survey data (descriptive statistics).
A previously used drug treatment has a mean remission time of 12.5 weeks. Does the data indicate that the mean remission time using the new drug is different from 12.5 week at a level of significance of 0.01?
Fitting of multiple linear regression equation - Give a list of the model assumptions for a regression model.
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