Question

Consider the grouped frequency distribution. Class Limits 3-5 6-8 9-11 12-14 15-17 f 7 11 9...

Consider the grouped frequency distribution.

Class Limits 3-5 6-8 9-11 12-14 15-17
f 7 11 9 3 7

(a) Find the mean. (Give your answer correct to two decimal places.)

(b) Find the variance. (Give your answer correct to two decimal places.)

(c) Find the standard deviation. (Give your answer correct to two decimal places.)

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

a) For the given grouped frequency the mean is calculated as:

Where,

Mean=9.35

b) The Variance is calculated as:

=17.07

c) Sample standard deviation is calculated as:

=4.13

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