Seven different thermometers were used to measure the


1. Use the rules of summation notation to show that it is always the case that

Σ(Xi - X) = 0

2. Seven different thermometers were used to measure the temperature of a substance. The readings in degrees Celsius are -4.10, -4.13, -5.09, -4.08, -4.10, -4.09 and -4.12. Find the variance and standard deviation.

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Basic Statistics: Seven different thermometers were used to measure the
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