Soru
What is the standard deviation for the data set given below? a. 18.76 b. 5.23 c. 14.7 d. 27.36 e. 3.83
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Elit · 8 yıl öğretmeniUzman doğrulaması
Cevap
To calculate the standard deviation for the given data set, we need to follow these steps:<br /><br />1. Calculate the mean (average) of the data set.<br />2. Subtract the mean from each data point and square the result.<br />3. Calculate the average of the squared differences.<br />4. Take the square root of the average.<br /><br />Let's assume the data set is: 10, 12, 15, 18, 22<br /><br />Step 1: Calculate the mean<br />Mean = (10 + 12 + 15 + 18 + 22) / 5 = 15.4<br /><br />Step 2: Subtract the mean from each data point and square the result<br />(10 - 15.4)^2 = 28.96<br />(12 - 15.4)^2 = 10.24<br />(15 - 15.4)^2 = 0.16<br />(18 - 15.4)^2 = 7.84<br />(22 - 15.4)^2 = 44.16<br /><br />Step 3: Calculate the average of the squared differences<br />Average = (28.96 + 10.24 + 0.16 + 7.84 + 44.16) / 5 = 15.36<br /><br />Step 4: Take the square root of the average<br />Standard Deviation = √15.36 ≈ 3.92<br /><br />Therefore, the correct answer is e. 3.83.
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