Determine the probability that 15 randomly selected jars of


1.A brand of salsa comes in jars marked net weight 680 grams. Suppose the actual mean net weight of all jars is 680 grams with a standard deviation of 22.7 grams. Further suppose that the net weights are normally distributed.

a. Determine the probability that a randomly selected jar of this brand of salsa will have a weight less than 660 grams.

b. Determine the probability that 15 randomly selected jars of this brand of salsa will have a mean weight of less than 660 grams.

c. Why are these probabilities not the same? 

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