Statistics question and answers for September 23, 2023
- Q A computer can be classified as either cutting-edge or ancient. Suppose that 92% of computers are classified as ancient.(a) Two computers are chosen at random. What is the probability that...
- Q Due to a manufacturing error, three cans of regular soda were accidentally filled with diet soda and placed into a 24-pack. Suppose that two cans are randomly selected from the...
- Q A set has 10 outliers. If every value of this set is increased by 5 percent, how many outliers will there now be?(A) Fewer than 10(B) 10(C) 11(D) More than...
- Q The mean length of human pregnancies is 266 days with a standard deviation of 16 days. Which of the following is the best description of the standard deviation? (A) Approximately...
- Q What is the probability that a randomly selected orange will have less than 660 IU of vitamin C?
- Q A new surgery is successful 75% of the time. If the results of 7 such surgeries are randomly sampled, what is the probability that more than 5 of them are...
- Q Suppose Emerson wins 34% of all checker games.(a) What is the probability that Emerson wins two checker games in a row?(b) What is the probability that Emerson wins five checker...
- Q About 8% of the population of a large country is nervous around strangers. If two people are randomly selected, what is the probability both are nervous around strangers? What is...
- Q Suppose that a computer chip company has just shipped 10,000 computer chips to a computer company. Unfortunately, 60 of the chips are defective.(a) Compute the probability that two randomly selected...
- Q According to a center for disease control, the probability that a randomly selected person has hearing problems is 0.157. The probability that a randomly selected person has vision problems is...
- Q A probability experiment is conducted in which the sample space of the experiment is S={1,2,3,4,5,6,7,8,9,10,11,12). Let event E={1,2,3,4,5,6,7,8,9). Assume each outcome is equally likely. List the outcomes in E^c. Find...
- Q The spinner for a child's board game has five equally-sized colored regions, one of which is green. If we spin the spinner 50 times, construct a box model for the...
- Q According to a survey, 45% of teenagers could recognize a picture of legendary film star John Wayne. What is the probability that a randomly-selected teenager could recognize John Wayne?0.550.450.010.82
- Q A population has ? = 50. Which value of ? would make X = 55 an extreme value out in the tail of the populationdistribution?? =1? = 6? = 10This...
- Q A normal distribution has a mean of = 60 with ?=8. For this population, which is the X value that corresponds to the third quartile (tip: third quartile is equal...
- Q For a population with = 100 and ? = 20, what is the X value corresponding to z = -0.25?X = 85X = 95X = 105X = 115
- Q Scores on a standard IQ test are normally distributed with mean 100 and standard deviation 15. Use the Empirical Rule and make a sketch for each problem. What percent of...
- Q Which statement accurately describes the proportions in the tails of a normal distribution?The proportion in the left-hand tail is smaller than the proportion in the right-hand tail.Proportions in both the...
- Q A normal distribution has a mean of = 40 with ? = 10. If a vertical line is drawn through the distribution at X = 34, which proportion of the...
- Q Marty is a principal who needs to contact the highest performing 15% of students in his school's current graduating class about an opportunity to join the school's academic honor society....
- Q Roberto, John, Marco, Dominique, and Clarice work for a publishing company. The company wants to send two employees to a statistics conference. To be fair, the company decides that the...
- Q A baseball player hit 57 home runs in a season. Of the 57 home runs, 18 went to right field, 20 went to right center field, 9 went to center...
- Q Which statement about the Nicki Minaj sample is true compared to the Kendrick Lamar sample?The Nicki Minaj sample has a larger mean and a larger standard deviation than the Kendrick...
- Q Airline passengers arrive randomly and independently at the passenger-screening facility at a major international airport. The mean arrival rate is 10 passengers per minute. Compute the probability of at least...
- Q The mean annual cost of automobile insurance is $939. Assume that the standard deviation is o $245. What is the probability that a simple random sample of automobile insurance policies...
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