Find the standard deviation of {7, 13, 15, 11, 4}

  1. 16
  2. 25
  3. 5
  4. 4

Answer (Detailed Solution Below)

Option 4 : 4
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Detailed Solution

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Given:

7, 13, 15, 11, 4

Formula used:

 

Mean (m) = Total of observations/number of observations

S.D = standard deviation

∑ = summation

x = observation

m = mean of the observations

n = number of observation

Calculation:

Mean of 7, 13, 15, 11, 4

⇒ 50/5

⇒ 10

⇒ 

⇒ 

⇒ √16

⇒ 4

∴ The standard deviation is 4 

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