That is why when we divide the length of the street by the length of the devices, we have to ROUNDUP that number to get the number of measurements.
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. 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. We will match any price for the same quality glasses.Īs always if you need our help we are but a call away at 866 217-5878, 9 a.m.–7 p.m.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. Our customer's service is but a phone call/email away, we are standing by to assist you in every way. Ask a friend to help if you are having trouble. Make sure your head and the ruler do not move after lining up the zero (0) measurement with the bottom of your lens until you note your measurement. Repeat these steps at least 3 to 5 times to get an accurate and consistent measurement. This is your segment height measurement for these frames.Ħ. Stare straight ahead and read the millimeter line that lines with the center of your pupil. Make sure you are measuring from the bottom of the clear lens, not the bottom of the frame (see graphic above).ĥ. Align the ruler's zero (0) measurement to the lowest point at the bottom of your lens, keeping it exactly vertical. Stand about 8 inches (20 cm) away from a well lit mirror with your face parallel and square to the mirror.Ĥ. Put the glasses on your face and adjust them so that they sit comfortably.ģ. You can also use a ruler with centimeter measurements and simply times the result by 10 to get your millimeter measurement.Ģ. Use a ruler that has millimeter measurements.