Statistics question and answers for September 27, 2023
- Q Four books are selected at random from a bookstore and classified as hardcover or paperback. List the elements of the sample space S?, using the letter H for hardcover or...
- Q A nationwide survey of college seniors by a university revealed that almost 60% disapprove daily pot smoking, according to a report in a magazine. If 14 seniors are selected at...
- Q In 1970, 9% of people in a certain region completed four years of college, 38% of them were women. In 1990, 20% of people in the same region completed four...
- Q A$150,000 mortgage amortized by monthly payments over 25 years is renewable after five years.(a) If interest is 6.04% compounded semi-annually, what is the size of each monthly payment?(b) Find the...
- Q The combined scores of the almost 1.7 million high school seniors taking the SAT in 2013 were approximately Normal with mean 1011 and standard deviation 216. According to the 68-95-99.7...
- Q According to the 68-95-99.7 Rule, what percent of high school seniors had SAT scores between579 and 1443?68%95%99.7%impossible to tell.
- Q According to the 68-95-99.7 Rule, 99.7% of high school seniors had SAT scores betweenwhat and what?
- Q The upper arm length of females over 20 years old in the United States is approximately Normal with mean 35.8 cm and standard deviation 2.1 cm.According to the 68-95-99.7 Rule,...
- Q For 14-year-old boys, the distribution of blood cholesterol is approximately Normal with mean =170 milligrams of cholesterol per deciliter of blood (mg/dL) and standard deviation o = 30 mg/dL. According...
- Q Select ALL of the CORRECT answers.Standard deviation s for a data set can be equal to 0...only if the data values are all 0.impossible.or positive, but never negative.every time that...
- Q A fair coin is flipped 100 times. Let X be the number of heads. What normal distribution best approximates X? Provide your answer below:
- Q Let X be the waiting time for a customer to talk to a customer service representative. Suppose X is exponentially distributed with an average value of 6 minutes. Find the...
- Q On average, Nancy has noticed that 20 trucks pass by her apartment daily (24 hours). In order to find the probability that more than 2 trucks will pass her apartment...
- Q A tire company finds the lifespan for one brand of its tires is normally distributed with a mean of 47,500 miles and a standard deviation of 3,000 miles. What mileage...
- Q Sugar canes have lengths, X, that are normally distributed with mean 365.45 centimeters and standard deviation 4.9 centimeters. What is the probability of the length of a randomly selected cane...
- Q Company XYZ's overhead is normally distributed with a mean expense of 73 (?) and a standard deviation of 5(?). Using the Empirical Rule, about 99.7% of the expenses lie between...
- Q The random variable X is exponentially distributed, where X represents the waiting time to be seated at a restaurant during the evening. If X has an average value of 19...
- Q One operation of a mill is to cut pieces of steel into parts that will later be used as the frame for front seats in an automobile. The steel is...
- Q A county office gets an average of 10 calls in a 2 hour time period. What is the probability that the county office will get more than 0 calls in...
- Q The probability of buying a movie ticket with a popcorn coupon is 0.608. If you buy 10 movie tickets, what is the probability that 3 or more of the tickets...
- Q On average, the time it takes for a car to pass a certain intersection is 18 minutes. If the wait time is exponentially distributed, what is the probability that the...
- Q A multiple-choice test consists of 160 questions with possible answers of A, B, C, and D. Estimate the probability that with random guessing, the number of correct answers is between...
- Q A softball pitcher has a 0.675 probability of throwing a strike for each pitch and a 0.325 probability of throwing a ball. If the softball pitcher throws 29 pitches, we...
- Q Let X be the waiting time for a fire department to get called to a house fire, where X has an average value of 32 hours. If the random variable...
- Q The amount of time it takes Tom to make breakfast is continuous and uniformly distributed between 4 minutes and 11 minutes. What is the probability that it takes Tom between...
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