Lesson 19 Accuracy and errors
|Expressing error in full proportional terms.|
|‘the error ratio depends on how far the rounded 7 figure is from the original'. The maximum error for 2 sig. figs is 0.05. in relation to a rounded total of 7 this gives a 5% error ratio, which diminishes fo 0.5% in relation to 10’|
|‘you've got to look at how big the error is compared with the total price’||‘the error ratio seems to depend on how far the rounding differs from the total number’|
|'compared with £129.04p is almost nothing’|
|Infinity of numbers by continuing to subdivide by factors of 10||
‘error is the same: it's the same cheat!’
|Increasing accuracy by reading to hundredths|
How many numbers does this measurement cover?
How big is the error?
Errors in rounding