Find the probability that an individual student’s weight is a. Less than 45 kg. b. Between 48 and 51 kg. c. Greater than 63 kg.

1. The birth weight X (in grams) of babies in the United States is normally distributed with a mean of 3315 and standard deviation of 575. Find the following: a. P(X 6 3890) b. P(2740 6 X) c. P(2165 6 X 6 4465) d. The birth weight that the upper 5% of babies achieve. 2. The weight of high school boys in a certain city is normally distributed, with mean m = 50 kg and standard deviation s = 4 kg. Find the probability that an individual student’s weight is a. Less than 45 kg. b. Between 48 and 51 kg. c. Greater than 63 kg.

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