The following are the numbers of summer jobs a sample of six students applied for : 17, 15, 23, 7, 9,…
The sample variance is 33.2. The mean is \(84/6=14\), and the sum of squared deviations is \(9+1+81+49+25+1=166\). Dividing by \(n-1=5\) gives \(s^2=166/5=33.2\).
Choose your answer
The following are the numbers of summer jobs a sample of six students applied for :
17, 15, 23, 7, 9, 13
The sample variance is :
Answer and explanation
Correct answer C
The sample variance is 33.2. The mean is , and the sum of squared deviations is . Dividing by gives .
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Himachal Pradesh SET (HP SET)