Statıstıcs I Deneme Sınavı Sorusu #1279505
Data : 100, 120, 120, 180, 200. What is the sample standard deviation of these data ?
|
5.5251/2 / 3 |
|
6.6251/2 / 3 |
|
8.2751/2 / 3 |
|
7.4751/2 / 2 |
|
9.2501/2 / 2 |
Yanıt Açıklaması:
arithmetic mean : m = 720 / 5 = 145 ; s = ((452 + 252 + 252 + 352 + 552) / 4)1/2 = ((2.025 + 625 + 625 + 1225 + 3.025) / 4)1/2 = (7.475 / 4)1/2 . pg. 111 . Correct answer is D.
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