# Exercise Solution 7.2

For items (a), (b), (c) and (d), see a spreadsheet. Turning to item (e), estimates obtained for ^{1 | 0}σ_{1} in parts (b), (c) and (d) are .0310, .0278 and .0325. There is a significant amount of variability between the three estimates. This highlights the impact that our choice of estimator can have on estimated standard deviations.