(1 point) The distribution of actual weights of 8-oz chocolate bars produced by a certain machine is normal with mean 7.7 ounces and standard deviation 0.19 ounces. (a) What is the probability that the average weight of a bar in a Simple Random Sample (SRS) with 4 of these chocolate bars is between 7.54 and 7.87 ounces? ANSWER: (b) For a SRS of 4 of these chocolate bars, what is the level L such that there is a 3% chance that the average weight is less than L? ANSWER:
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