However, for the sake of simplicity let’s assume that user error is ZERO here.
That is why analysts should pick their choice of aggregation level of observations used in their models based on the final accuracy level that they expect from those models, not on the accuracy level that they gain from the choice of their observations, e.g. Yet, you still might spend a lot of time and end up with major backache just for the sake of slightly more accuracy in measuring a length that could be measured using a tape measure only once. However, if the length of your street was about one hundredth of a mile, then the school ruler would have given you more accurate results. We see that not only using the tape measure is faster, but will also give us more accurate results. Nevertheless, we should not forget that, overall, the street is long enough that the tape measure would give us an even more accurate estimate of the street length than the school ruler. You might think that the point is: “it is definitely faster and more convenient to use the tape measure and that is why we should choose the tape measure over the school ruler.” But, what if speed was not an issue?Īn analogy of that in today’s analytics world is that computers are so fast that it really does not matter if I choose “school ruler” over “tape measure”. However, in case of using the school ruler that number rises to 5,280 times.
RULER MEASUREMENT FULL
So, if your street is about a mile, you have to use the full length of tape measure about 18 times. A normal school ruler is 12 inches while a typical tape measure is 300 ft. Some simple math could give us the answer. But, does that mean the school ruler is the right choice? Going back to our example, we know that we have higher precision using the school ruler (let’s assume that precision for the school ruler is ☐.01” versus ☑” for the tape measure). That question, in essence, is what analysts should always ask themselves before approaching their problems. Imagine you are given the task to measure the length of the street you live on, and you are only allowed to use either a tape measure or a school ruler.