A population consists of the numbers 4, 6, 11, 12 and 7. List all the possible size of 3 from this population and compute the mean and variance of the sampling distribution of the sample means.

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Q: Class limits 10-20 21-31 32-42 43-53 54-64 65-75 Frequency 2 8 15 7 10 3

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Q: ECRA) 20% E (R) 30% A = 10% B-20%

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