4.04%
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To find the percent difference between two numbers, you first calculate the absolute difference between the two numbers. In this case, the absolute difference between 1419 and 1286 is 133. Next, you divide this absolute difference by the average of the two numbers (1352.5) and multiply by 100 to get the percent difference. Therefore, the percent difference between 1419 and 1286 is approximately 9.82%.
The difference between 6%, 9%, and 12% Hydrogen Peroxide solution is the Hydrogen content.
The formula for margin of error is (Z*)*(Standard Deviation))/(sqrt(N)), so as N increases, the margin of error decreases. Here N went from 100 to 5000, so N has increased by 4900. This means the margin of error decreases. Since the confidence interval is the mean plus or minus the margin of error, a smaller margin of error means that the confidence interval is narrower.
Presumably, 0.6 percent.
percent includes all answers, whereas valid percent excludes missing answers of I don't know or blanks