A sample of 36 data values, x, gave (x 45) = 148 and (x

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A sample of 36 data values, x, gave Σ(x − 45) = −148 and Σ(x − 45)² = 3089.

i. Find the mean and standard deviation of the 36 values.

ii. One extra data value of 29 was added to the sample. Find the standard deviation of all 37 values.

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