Mathematics, 26.03.2020 20:33 cogger9348
Each of 12 refrigerators of a certain type has been returned to a distributor because of an audible, high-pitched, oscillating noise when the refrigerators are running. Suppose that 7 of these refrigerators have a defective compressor and the other 5 have less serious problems. If the refrigerators are examined in random order, let X be the number among the first 6 examined that have a defective compressor. (a) Calculate P(X = 4) and P(X β€ 4). (Round your answers to four decimal places.) P(X = 4) = P(X β€ 4) = (b) Determine the probability that X exceeds its mean value by more than 1 standard deviation. (Round your answer to four decimal places.) (c) Consider a large shipment of 400 refrigerators, of which 40 have defective compressors. If X is the number among 20 randomly selected refrigerators that have defective compressors, describe a less tedious way to calculate (at least approximately) P(X β€ 6) than to use the hypergeometric pmf. We can approximate the hypergeometric distribution with the distribution if the population size and the number of successes are large. Here n = and p = M/N = . Approximate P(X β€ 6) using that method. (Round your answer to three decimal places.) P(X β€ 6) β
Answers: 2
Mathematics, 21.06.2019 13:30
The blue whale is the largest animal living on the earth. the average blue whale measures 100 feet long (30 meters) and weighs 300,000 pounds (136,000 kilograms). a whaleβs head is 1β3 of the length of its body. a new baby whale is 1β4 the length of a grown whale. the average man is 1β17 the length of a blue whale, and 1β1,818 its weight. a human baby measures 1β4 of the length of an adult. calculate the following information: how long is a whaleβs head? how long is a new baby whale? how tall is the average man? how much does the average man weigh? how tall is the average human baby?
Answers: 3
Mathematics, 21.06.2019 15:30
The function Ζ is defined by Ζ(x) = (x + 3)(x + 1). the graph of Ζ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of Ζ?
Answers: 2
Mathematics, 21.06.2019 22:50
Jim had 15 minutes to do 5 laps around his school what would his time be
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Mathematics, 22.06.2019 02:30
Cate purchases $1600 worth of stock and her broker estimates it will increase in value by 4.2% each year. after about how many years will the value of cate's stock be about $2000
Answers: 1
Each of 12 refrigerators of a certain type has been returned to a distributor because of an audible,...
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