Stats Assignment Week Four
Week 4 Confidence Intervals and Chi Square (Chs 11 – 12) Let’s look at some other factors that might influence pay. For question 3 below, be sure to list the null and alternate hypothesis statements. Use .05 for your significance level in making your decisions. For full credit, you need to also show the statistical outcomes – either the Excel test result or the calculations you performed. 1 One question we might have is if the distribution of graduate and undergraduate degrees independent of the grade the employee? (Note: this is the same as asking if the degrees are distributed the same way.) Based on the analysis of our sample data (shown below), what is your answer? Ho: The populaton correlation between grade and degree is 0. Ha: The population correlation between grade and degree is > 0 Perform analysis: OBSERVED A B C D E F Total COUNT – M or 0 7 5 3 2 5 3 25 COUNT – F or 1 8 2 2 3 7 3 25 total 15 7 5 5 12 6 50 EXPECTED 7.5 3.5 2.5 2.5 6 3 25