get a manufacturing company uses two different machines, a and b, each of which produces a certain item part. the number of defective parts produced by each machine is about 1 percent. suppose two independent random samples, each of size 100, are selected, where one is a sample of parts produced by machine a and the other is a sample of parts produced by machine b. which of the following is true about the sampling distribution of the difference in the sample proportions of defective parts? from EN Bilgi.
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A summer resort rents rowboats to customers but does not allow more than four people to a boat. Each boat is designed to hold no more than 800 pounds. Suppose the distribution of adult males who rent boats, including their clothes and gear, is normal with a mean of 190 pounds and standard deviation of 10 pounds. If the weights of individual passengers are independent, what is the probability that a group of four adult male passengers will exceed the acceptable weight limit of 800 pounds?