What, if anything, do the calculations in part 4 tell you about the effectiveness of the treatment on the wells? How many wells are expected to see improvements within this range? Justify your answer using the lower and upper bounds found in part 4

4a. Use the calculations above and the Empirical Rule to calculate the upper and lower limits, which 68% (~68.27%) of the improvement data fall between. Use Excel formulas with cell references and format each value as a Number with two decimal places. 68% of Improvement Data Lower Bound Upper Bound -15.85 -3.62 Note how this interval compares to the interval found in 3. 4b. As a check on understanding, complete the following sentence by replacing the indicated items by the correct values in the box below: About number wells showed a reduction of between lower-bound and upper-bound E. coli per mL. About 68% wells showed a reducion between 15.85 and -3.62 E.