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  • A good scientific measurement is made with accuracy and precision.

    一個好的科學量測方式須具備準確度和精密度

  • Accuracy tells us how close

    準確度是指

  • a particular measurement is to the correct value.

    測量出的數據有多接近正確的數值

  • For instance,

    舉例來說

  • how close is the reading of a thermometer to the actual temperature?

    溫度計顯示出的溫度和真實的氣溫有多少誤差?

  • Precision is the consistency of repeated measurement.

    精密度則是指多次測量結果的一致性

  • In other words, are the results consistent

    也就是說,每次測量時

  • each time something is measured?

    結果是否都相同?

  • The more consistent the results,

    得到的結果越一致

  • the more precise the measurement.

    表示精密度越高

  • It is possible to have a precise measurement that is not accurate.

    有可能出現高精密度而低準確度的情況

  • It is also possible to have an accurate measurement that is not precise.

    也可能會是高準確度卻低精密度的結果

  • The best measurements are both accurate and precise!

    所以最好的測量方式還是兩者兼具

  • Let us look more closely at the difference between accuracy and

    讓我們進一步解釋準確度和精密度的不同

  • precision using an archer and target.

    舉一個弓箭手和箭靶的例子

  • The archer is accurate when he hits the bull's eye.

    當弓箭手正中紅心,代表他的射擊很準確

  • He is precise when he can consistently hit the same spot on the target,

    當他持續射中靶上的同一區域,表示他很精確

  • in this case the bull's eye, over and over again.

    在這個例子中,他一次又一次擊中

  • This archer is both accurate (he hits the bull's eye) and

    表示這個弓箭手兼具準確度 (他正中紅心) 和

  • precise (he is able to hit the same area of the bull's eye repeatedly).

    精密度 (他能不斷擊中同一區域)

  • It is also possible for the archer to be precise, but inaccurate.

    也有可能這個弓箭手射擊精密,但不準確

  • If he misses the bull's eye, he is inaccurate; he has missed the mark.

    如果他沒正中紅心,表示他射得不準確,偏離目標

  • But if he can consistently and

    但如果他可以持續且

  • repeatedly hit the target in the same place,

    重複的擊中同樣的地方

  • even if it is not the bull's eye, he is precise.

    即使不是在標靶中心, 他仍是精確的

  • On the other hand, the archer may be accurate, but not precise.

    反過來說,弓箭手也有可能射擊準確,卻不精密

  • If he strikes the bull's eye or right next to the bull's eye,

    如果他射中紅心,或只偏離紅心一些的區域

  • but his arrows are not consistently placed,

    但他的箭卻較分散

  • then the archer is accurate, but not precise.

    那表示這個弓箭手是具有準確度,卻沒有精密度

  • In this case,

    在這個例子裡

  • the arrows would be spread across the bull's eye

    箭會散落在紅心附近的區域

  • rather than clumped together in a small area.

    而不是擠在一個極小的範圍裡

  • If our archer is having a really bad day,

    又如果我們的弓箭手今天運氣不太好

  • he might even be inaccurate and imprecise.

    它甚至有可能不準確又不精密

  • In this case,

    範例中

  • his arrows will strike the target in a random pattern and

    他的箭會隨機的擊中標靶,而且

  • he will not hit the same part of the target time after time.

    每一次都無法射中標靶的同一位置

A good scientific measurement is made with accuracy and precision.

一個好的科學量測方式須具備準確度和精密度

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B1 中級 中文 美國腔 弓箭手 準確 標靶 擊中 射中 射擊

精度和精度 (Accuracy and Precision)

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    羅紹桀 發佈於 2021 年 01 月 14 日
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