Question

If mean of a distribution is 20 and number of items in the distribution is ` 10, what will be the sum of all the items in the given series? (a) 200 (b) 400 (c) 500 (d) Can’t be determined
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Answer 1

Answer:

Explanation:

If you know the mean you know the standard deviation. Take your data point, subtract the mean from the data point and then divide by your standard deviation. That gives you your Z-score.