These are unsorted hourly wages in dollar of nine individuals:

1. 74
2. 34
3. 28
4. 42
5. 21
6. 23
7. 19
8. 78
9. 36

Report measurement units where appropriate.

1. Compute the sample mean
2. Compute the three quartiles and the IQR
3. Interpret Q1
4. Compute the standard deviation (provide all computation details).
5. Using the empirical rule, make sense of what you find for the mean and standard deviation. (Hint: compute an interval whose bounds are given by the mean plus and minus 2 standard deviations)
6. Use the IQR to detect outliers (hint: compute an interval whose bounds are Q1-1.5IQR and Q3+1.5IQR). Do you find any outlier?
7. For all statistics computed above, describe which are location and which are dispersion measures.
8. For all statistics computed above, describe which are robust to outliers and why.
9. Report and interpret the z-score of the first individual in the sample (whose wage is 74 dollars/hour).
10. Which observation will have the largest z-score?