Statıstıcs I Deneme Sınavı Sorusu #1279540
Data format : (class interval, frequency) data : (100 up to 120, 1), (120 up to 180, 2), (180 up to 200, 1), (200 up to 250, 1). What is the sample standard deviation of these data ?
|
4.8501/2 / 3 |
|
7.5251/2 / 2 |
|
8.8751/2 / 3 |
|
6.6751/2 / 2 |
|
9.6251/2 / 3 |
Yanıt Açıklaması:
arithmetic mean : m = 850 / 5 = 170 ; s = ((602 + 202 + 202 + 102 + 552) / 4)1/2 = ((3.600 + 400 + 400 + 100 + 3.025) / 4)1/2 = (7.525 / 4)1/2. pg. 111. Correct answer is B.
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