Product codes of 2, 3, 4, 5, or 6 letters are equally likely. What is the mean and variance of the number of letters in the codes

Step-by-step explanation:

Given

Codes: 2,3,4,5,6

Required

Determine the Mean and Variance

Equally likely implies that the data follows a uniform distribution.

So,

Where

Variance of a uniform distribution is calculated as thus;

Substitute values for a and b

answer: 4 meters

step-by-step explanation: to you understand 2/3 better you can do 1 divided by 3 = . then multiply that by the 2 which is .66666666666666667 then you would do 6 x .66666666666666667 which is 4.      

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