Answer Happy

Question 6 The data set on supervisor performance has information on an overall measure of supervisor performance (Y), as well as a measure of how often they give raises based on performance (X4) as well as 5 other measures. The data file P060.txt is posted on Canvas. 1. Create a boxplot of the supervisor rating Y, splitting the data based on the median of X4. 2. Compute the sample mean, sample standard deviation Y in the two groups. 3. Create a histogram of Y within each group. 4. Compute a 90% confidence interval for the difference in supervisor performance between the two groups. What assumptions are you making? 5. At level a = 5%, test the null hypothesis that the average supervisor performance does not differ between the two groups. What assumptions are you making? What can you conclude?