Question

Find the range and standard deviation of the set of data. 11​, 9​, 7​, 12​, 11

Find the range and standard deviation of the set of data. 11​, 9​, 7​, 12​, 11

Math   Statistics-And-Probability   
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Answer #1

Solution :

Range = maximum - minimum

= 12 - 7 = 5

n = 5

= = (11 + 9 + 7 + 12 + 11) = 50 / 5 = 10

s =  (x - )2 / n - 1  

= (11 - 10)2 + (11 - 10)2 + (11 - 10)2​​​​​​​ + (11 - 10)2​​​​​​​ + (11 - 10)2​​​​​​​ / (5 - 1)

= 4

= 2

standard deviation = ​​​​​​​2

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