Use both the Student ID and Distance to Work variables. 1. List the Student ID at TESU in ascending order of Distance to Work.
2. Calculate the z-scores associated with each student (use the sample standard deviation for this calculation).
3. Identify potential outliers and explain your reasoning.
Confidence Intervals/Samples
1. Take a sample of the first four data points for the variable Distance to Work (unsorted - use the original order in the dataset).
2. Determine the 95% and 99% confidence intervals using the same size of 4.
3. Describe and compare the two intervals.
1. Take a sample of the first seven data points for the variable Distance to Work (unsorted - use the original order in the dataset).
2. Determine the 95% confidence interval. Use the same mean and SD, but change the sample size to 20 and determine the 95% confidence interval.
3. Describe and compare the two intervals.
ID Distance to Work (whole miles) 1 0 2 0 20 0 16 0 17 0 3 5 14 5 11 7 23 7 13 8 4 10 15 12 22 12 18 15 5 15 24 15 26 20 19 23 21 25 6 30 9 30 7 32 8 36 25 40 10 42 12 82