Diet X runs a number of weight reduction centres within a large town in the north east
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Diet X runs a number of weight reduction centres within a large town in the north east of England. From the historical data it was found that the weight of participants is normally distributed with a mean of 150 lb and a standard deviation of 25 lb. This can be written in mathematical notation as X ~ N (150, 252). Calculate the probability that the average sample weight is greater than 160 lb when 25 participants are randomly selected for the sample.
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