Recent Tutoring Session Reviews
"We reviewed the student's homework on chapter 9, which included hypothesis testing for z-tests, t-tests, and 1-proportion z-tests. She did well with identifying the null and alternative hypothesis, and she also did an excellent job plugging values into the calculator. The shortcut we discussed for when to use each test was if you are given sigma, use the z-test; if you are given the sample standard deviation, s, use the t-test; and if you are given a proportion, use the 1-pro Z-test. Also look to see if the problem contains a percent, and if it has no mean."
"The student and I had a good session working with different hypothesis tests. He had not done hypothesis tests in awhile, so it was a good refresher. He worked through the first 4 problems of his homework, outlining how to present the hypothesis test. The problems often involved manual calculations (which just involves knowing the formula in order to enter it), and the actual R functions, which we worked on designing properly. I left him with the other 9 problems to do himself as much as he can, now that he has the initial logic, and we are going to meet tomorrow morning before his class to wrap it up."
"We reviewed calculation of z-scores for the standard normal curve, and solved several problems calculating that the probability that a sample mean would be less than or greater than some value, given the population mean and standard deviation. We also looked at some normal quantile plots that give you an idea if a sample is drawn from a normal population."
"The client is a graduate student who has to do a group research project. He has to decide on a statistical test and choose variables from a database. We walked through the various options and which types of tests require which types of variables. He also has to do a critique on a research article and start the literature review for his project. We walked through the process of doing a research critique since it was his first time, and then we started searching for articles. I gave him tips and strategies I learned while doing my dissertation. We also went over all of the slides in a PowerPoint that his instructor had provided to make sure that he understood all of the concepts."
"We went over a bunch of financial concepts, including current and quick ratios, liquidity, inventory turnover, operating profit margins, dividends and retained earnings, and measures investors use to determine what stocks to purchase."
"The student and I covered confidence intervals. I first went into detail about the purpose of confidence intervals and how they are interpreted. We then reviewed the formula and how it connects with the z score formula. Finally, we reviewed the conditions needed to properly conduct such a calculation. We spent the rest of the session going over problems."