SOLUTION: I need help. my teacher never touched this section. 2.2 Find the mean and the standard deviation of the set of numbers 5, 8,8,9,14,18,100.

Question 1115412: I need help. my teacher never touched this section.
2.2 Find the mean and the standard deviation of the set of numbers 5, 8,8,9,14,18,100.
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
mean of
, , , , , , is:
≈

and standard deviation is:
The standard deviation of a probability distribution is defined as the square root of the variance.
To find the variance, subtract the mean from each of the x values,

18-23.143 = -5.143

Now square all the answers you have got from subtraction.

Add all the Squared numbers,

Divide the sum of squares by to get variance
.... and in your case

Find the square root of variance=standard deviation,
≈

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