Recent Tutoring Session Reviews
"We discussed and worked the remaining parts of the country statistics project including how to use a spreadsheet to calculate various descriptive statistics from a sample, how to plot a scatter plot and trend line, and how to use the spreadsheet to calculate linear regression. We also finished part of the write-up for this project."
"During this session we covered further use of statistical inference, using t and z tests. No test grades yet, but will be returned soon. Student was needed help with which calculator functions to use, but after some confusion, the functions were figured out. No extra practice, although I will keep in contact with student until our next session."
"Today, we continued to talk about expectations, and then moved on to standard errors and independent random variables. We went over the definition of standard errors, and how you can calculate them. We did some examples and talked about some properties of standard errors. We derived the standard error of binomial distribution, using the definition, and started doing problems. In the end, we ran out of time to finish all the problems, but she seems to understand the major concept of the materials."
"Today, the student and I worked on finding the mean, median, mode, standard deviation, sum of squares, variance, and range of a sample. We also worked on solving problems in the order provided, and then solving them again, in reverse. For example, she would be given the variance and the sum of squares, and need to find the n and the standard deviation. We really focused on n-1 and how that effects the rest of the problem. We also focused on the rounding unit found in the range. She told me that she has a B in the class because she did not do well on a test. She has another test this week. She has word problems out of the book to work on until then."
"We reviewed all three types of t-tests: one sample, independent sample, and paired sample. We discussed how to write hypotheses and the specifics of each formula. We also discussed how each test has slightly different assumptions and how to assess each. We then reviewed how the Wilcoxon Sign Rank test as a non-parametric alternative to the t-test. This meant reviewing the levels of data (nominal, ordinal, interval, and ratio)."
"Today the student finished his last homework, which had problems on Chi-square, ANOVA, and regression. He is doing really well with the material, after guidance through the first problem he only needs reminders for the smaller details of the test on subsequent problems. Tomorrow we will be creating his cheat sheet for the final and working on his class project. Once we complete the cheat sheet we will try doing more practice problems utilizing the sheet so he can get comfortable with it and so we have plenty of time to add all the details he will be needing. In the meantime he will be starting his project by outlining the requirements for each hypothesis test so that it will be ready for our next meeting for us to check and use."