statistics 255 – www.savvyessaywriters.net
statistics 255 – www.savvyessaywriters.net
Please use apa format and cite with scholarly sources(3). Please make sure the setting of language on microsoft word is english
A quick review of how to complete the course. Watch the Attend. Read the Chapter. Go to Dr. M’s website (http://www.drjimmirabella.
Okay, so here are some very important tips for being successful in the class:
1) Make sure you save every Excel file that you are going to upload to the Dropbox using your name and the unit number as the file name. (for example, I might save mine as CAMPBELL Unit 1.
2) Be very careful about copying and pasting in the spreadsheets. If you copy and paste cells from one spreadsheet to another you WILL end up with wrong answers! Dr. M has a lot of equations that are “hidden” that you will lose if you just copy and paste cells.
3) EVERY BOX in the Complete assignment MUST answer 3 questions
a) DEFINE WHAT YOU ARE DOING. This is NOT a step by step description of your actions. This is where you define and explain the statistics you are going to run to answer the question. For example, What is a categorical analysis? Why run it? What will it tell you? What variables are you going to use to run it? Show me that you know what you are running.
b) REPORT THE RESULTS. This is the EASY one. Everyone should get this one right every time! All you have to do is report the results using the appropriate “statistical terminology” that Dr. M has shown you in the text and in the Attend (yes, you should read and watch these!).
c) INTERPRET THE RESULTS. This one is NOT the same as reporting the results. No, NO, NO! Here you are going to explain what the results are telling us. What do they MEAN? What conclusions can we draw from the results? This is a critical part of the answer EVERY TIME! That’s because the point of the class is to make sure you can USE statistics. You show you can use them by (being able to explain why you use them in A above) being able to EXPLAIN what the results MEAN – that’s more than just reading the numbers that Excel spits out. For example, let’s say the results of your analysis say that there is a statistically significant difference between the GPAs of males versus females. If you say “I accept the alternative hypothesis that GPAs are different for males and females” that is NOT a good answer! All that answer did was restate the results. You MUST go on and explain what that result MEANS – INTERPRET it for me based on the information you have. So you might go on and say something like, “males tend to have higher GPAs than females. This may be true because males tend to work fewer hours than females and therefore they have more time to study.” That’s an interpretation – it may take a little creativity and it will take a reading of the chapter and watching the Attend as well as knowing your dataset. (And by the way, I made that up – that result or interpretation is not necessarily true!!
4) Access the data file from Dr. M’s website. Don’t use the link that is provided in the Complete assignment! Dr. M’s data file is a little different from the one that is in the Complete assignment. Dr. M’s is the one that is up to date. Here’s the biggest difference: when you do the Complete assignments the coding for gender is 0=MALE, 1=FEMALE. Always use this coding. The data file on Dr. M’s site uses this coding. The data file from the Complete does not!
5) The Final Project is just a repeat of some of the stats you will have run by doing the Complete assignments. You will still be answering the same 3 questions again! This means it is very important that you spend the time on the front end of the class getting each Complete assignment right. IF you do, the Final Project will be very easy! If you don’t work to get it correct the first go through, you’ll have a long and frustrating last week of the class!
1. Does undergraduate success predict graduate success? While most people complete their bachelor’s degree during the daytime while taking multiple classes and not working full-time, those getting an MBA are typically taking one or two courses at a time, in the evening or on weekends, and while working and even supporting a family. Yet one would expect those who perform better in their bachelor’s degree will perform better in their master’s. Using a significance level of .05, test whether there is a correlation between the BS GPA and the MBA GPA. Also, answer the following:
a) What is the correlation coefficient & how strong is it?
b) What is the best fit regression equation that can predict the MBA GPA from the BS GPA?
c) What percent of the variability in the MBA GPA can be explained by the regression model?
d) What would you expect a student’s MBA GPA to be if he/she had a 3.50 BS GPA?
2. To get an even better model for predicting MBA performance, let’s look at many variables. Create multiple regression model predicting the MBA GPA using the BS GPA, the Hours studied per week, the Gender of the student, whether the student works full-time, and the student’s age. Use a .05 significance level. After you create your model, predict the MBA GPA 40-year old student that studies 6 hours per week, works full-time, and had a 3.00 BS GPA.
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