# Describe range, variance, standard deviation and calculate values

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Given the following raw scores, calculate the following values, show your calculations:

Scores: 9, 7, 8, 4, 8, 8,7, 8, 9, 6, 3

a. Range _____________________

b. Variance ____________________

c. Standard Deviation _____________________

Describe each of the following statistical terms, and where applicable, define with the appropriate equation:

a. Range _______________________________________________

b. Variance _____________________________________________

c. Standard Deviation ______________________________________

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The expert describes the range, variance, standard deviation and calculate values.

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a) Range: Largest - Smallest = 9 - 3 = 6

b) Variance = (Sum of the squares of the observations/ No. of observations) - ( Mean)2,

Where Mean = Sum of the observations / No. of observations

Sum = 77

Mean = ...

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