Problem #8: Consider the following matrix of observation. [10 15 15 5 19 13 10 Problem #8(a): Problem #8(b): (a) Find the sample mean M of these observation vectors. Enter the two components of M in order into th answer box below, separated by a comma. (b) Find the total variance of the sample. answer correct to 2 decimals

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A: Note: As per our guidelines, we can solve first question. Please repost the remaining questions.

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