Paired Comparisons (2)• Suppose tha

Paired Comparisons (2)• Suppose that we wish to compare twosunscreens.– A better way to design the experiment would be to selectjust one simple random sample of subjects and let eachmember of the sample receive both sunscreens.– We could, for example, randomly assign the sunscreensto the left or the right side of each subject’s back witheach subject receiving both sunscreens.– After a specified length of exposure to the sun, wewould measure the amount of sun damage to each halfof the back. If the half of the back receiving sunscreen Atended to be less damaged, we could more confidentlyattribute the result to the sunscreen, since in eachinstance both sunscreens were applied to equallypigmented skin

結果 (繁體中文) 1:

Paired Comparisons (2)
• Suppose that we wish to compare two
sunscreens.
– A better way to design the experiment would be to select
just one simple random sample of subjects and let each
member of the sample receive both sunscreens.
– We could, for example, randomly assign the sunscreens
to the left or the right side of each subject’s back with
each subject receiving both sunscreens.
– After a specified length of exposure to the sun, we
would measure the amount of sun damage to each half
of the back. If the half of the back receiving sunscreen A
tended to be less damaged, we could more confidently
attribute the result to the sunscreen, since in each
例如既防曬劑應用到同樣
色素性皮膚病

結果 (繁體中文) 2:

配對比較 （2）
• 假設我們希望比較兩個
防 曬 霜。
• 設計實驗的更好方法是選擇
只是一個簡單的隨機樣本的主題，讓每個
樣本成員同時收到防曬霜。
• 例如，我們可以隨機分配防曬霜
到每個主題的背部的左側或右側
每個受試者同時接受防曬霜。
• 在暴露在陽光下指定長度後，我們
將測量太陽對每一半的傷害量
背部。如果背部接收防曬霜的一半 A
往往損害較小，我們可以更有信心
將結果歸因於防曬霜，因為在每個
實例兩個防曬霜被應用到平等
色素皮膚

結果 (繁體中文) 3:

配對比較（2）
•假設我們希望比較兩個
防曬霜。
–設計實驗的更好方法是選擇
只是一個簡單的隨機樣本
樣品的成員接受兩種防曬霜。
–例如，我們可以隨機分配防曬霜
在每個受試者背部的左側或右側
接受兩種防曬霜的受試者。
–在規定的日照時間後，我們
會量測每一半的太陽傷害量
在後面。如果一半背部塗防曬霜
我們可以更自信地
把結果歸因於防曬霜，因為
兩種防曬霜的使用量相等
色素性皮膚