PVC pipes is manufactured with a mean diameter of 1.01 inch and a standard deviation of 0.003 inch. Find the Probability that a random sample of n=9 sections of pipe will have a sample mean diameter greater than 1.009 inch and less than 1.012inch.
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Q: On the planet of Mercury, 4-year-olds average 2.9 hours a day unsupervised. Most of the unsupervised…
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Q: On the planet of Mercury, 4-year-olds average 3.1 hours a day unsupervised. Most of the unsupervised…
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- Suppose the inside radius of a "4 inch" pipe is normally distributed with a mean value of 2 inches with a standard deviation of 0.05 inches. Find the probability that a randomly selected section of this pipes has an inside radius of at least 1.92 inches.On the planet of Mercury, 4-year-olds average 2.8 hours a day unsupervised. Most of the unsupervised children live in rural areas, considered safe. Suppose that the standard deviation is 1.3 hours and the amount of time spent alone is normally distributed. We randomly survey one Mercurian 4-year-old living in a rural area. We are interested in the amount of time X the child spends alone per day.On the planet of Mercury, 4-year-olds average 3.1 hours a day unsupervised. Most of the unsupervised children live in rural areas, considered safe. Suppose that the standard deviation is 1.3 hours and the amount of time spent alone is normally distributed. We randomly survey one Mercurian 4-year-old living in a rural area. We are interested in the amount of time X the child spends alone per day. (Source: San Jose Mercury News) Round all answers to 4 decimal places where possible. b. Find the probability that the child spends less than 3.3 hours per day unsupervised. c. What percent of the children spend over 5.1 hours per day unsupervised. % (Round to 2 decimal places)d. 77% of all children spend at least how many hours per day unsupervised? hours.
- On the planet of Mercury, 4-year-olds average 2.9 hours a day unsupervised. Most of the unsupervised children live in rural areas, considered safe. Suppose that the standard deviation is 1.4 hours and the amount of time spent alone is normally distributed. We randomly survey one Mercurian 4-year-old living in a rural area. We are interested in the amount of time X the child spends alone per day. (Source: San Jose Mercury News) Round all answers to 4 decimal places where possible.a. What is the distribution of X? X ~ N(_______ ,______) I know that question a is (2.9,1.4) b. Find the probability that the child spends less than 1.3 hours per day unsupervised. c. What percent of the children spend over 3.4 hours per day unsupervised. % (Round to 2 decimal places) d. 82% of all children spend at least how many hours per day unsupervised? hours. Please help me understand how to do the rest.On the planet of Mercury, 4-year-olds average 3.1 hours a day unsupervised. Most of the unsupervised children live in rural areas, considered safe. Suppose that the standard deviation is 1.6 hours and the amount of time spent alone is normally distributed. We randomly survey one Mercurian 4-year-old living in a rural area. We are interested in the amount of time X the child spends alone per day. (Source: San Jose Mercury News) Round all answers to 4 decimal places where possible.b. Find the probability that the child spends less than 1.7 hours per day unsupervised. c. What percent of the children spend over 3.7 hours per day unsupervised. % (Round to 2 decimal places)d. 74% of all children spend at least how many hours per day unsupervised? hours.The mcat scores are normally distributed with a mean of 500, and a standard deviation of 10.6. Find the probability that a randomly selected medical student has an MCAT score that is greater than 522
- On the planet of Mercury, 4-year-olds average 3.2 hours a day unsupervised. Most of the unsupervised children live in rural areas, considered safe. Suppose that the standard deviation is 1.7 hours and the amount of time spent alone is normally distributed. We randomly survey one Mercurian 4-year-old living in a rural area. We are interested in the amount of time X the child spends alone per day. (Source: San Jose Mercury News) Round all answers to 4 decimal places if not otherwise specified.c. What percent of the children spend over 4.6 hours per day unsupervised. % (Round to 2 decimal places) d. 84.85% of all children spend at least how many hours per day unsupervised? hours. (Round to 2 decimal places)A nursery sells lime trees that have normally distributed heights with a mean of 2 ft and a standard deviation of 0.3 ft. Find the probability that a randomly selected tree is between 1 and 2 ft.On the planet of Mercury, 4-year-olds average 3.2 hours a day unsupervised. Most of the unsupervised children live in rural areas, considered safe. Suppose that the standard deviation is 1.3 hours and the amount of time spent alone is normally distributed. We randomly survey one Mercurian 4-year-old living in a rural area. We are interested in the amount of time X the child spends alone per day. (Source: San Jose Mercury News) Round all answers to 4 decimal places where possible.a. What is the distribution of X? X ~ N(,)b. Find the probability that the child spends less than 1.9 hours per day unsupervised. c. What percent of the children spend over 5.2 hours per day unsupervised. % (Round to 2 decimal places)d. 88% of all children spend at least how many hours per day unsupervised? hours.
- The length of time on the SAT exam for a group of students is normally distributed with a mean of 2.5 hours and a standard deviation of 0.25 hours. A sample size of n= 60 is drawn randomly from the population. Find the probability that the sample mean is between two hours and three hours.On the planet of Mercury, 4-year-olds average 3.1 hours a day unsupervised. Most of the unsupervised children live in rural areas, considered safe. Suppose that the standard deviation is 1.6 hours and the amount of time spent alone is normally distributed. We randomly survey one Mercurian 4-year-old living in a rural area. We are interested in the amount of time X the child spends alone per day. (Source: San Jose Mercury News) Round all answers to 4 decimal places where possible.a. What is the distribution of X? X ~ N(,) b. Find the probability that the child spends less than 1.7 hours per day unsupervised. c. What percent of the children spend over 2.3 hours per day unsupervised. % (Round to 2 decimal places) d. 67% of all children spend at least how many hours per day unsupervised?The average THC content of marijuana sold on the street is 10.2%. Suppose the THC content is normally distributed with standard deviation of 2%. Let X be the THC content for a randomly selected bag of marijuana that is sold on the street. Round all answers to 4 decimal places where possible,b. Find the probability that a randomly selected bag of marijuana sold on the street will have a THC content greater than 8.9. c. Find the 68th percentile for this distribution. %
