The probability of a bolt being faulty is 0.3. Find the probability that in a random sample of 20 bolts there are exactly 2 faulty bolts. 0.0278 0.0746 0.1304 0.1244
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- Use a normal approximation to find the probability of the indicated number of voters. In this case, assume that 181 eligible voters aged 18-24 are randomly selected. Suppose a previous study showed that among eligible voters aged 18-24, 22% of them voted. Probability that exactly 44 voted ... The probability that exactly 44 of 181 eligible voters voted isThree items are drawn in randomly from a population of 7 items. The item drawn may be defective or non-defective.Random variable is the occurrence of non-defective items. Total defective items in the population are two. Make a frequency distribution table of the random variable. Find the expected value of non-defective items in the random experiment.The proportion of individuals insured by a certain company who received at least one traffic ticket during a five-year period is 0.15. If a sample of 150 individuals insured by the company is taken, approximately what z-score would be used to find the probability that the sample proportion will be less than 0.13? O A. -0.68493 O B. -0.68966 O C. -0.68599 O D. -0.66667 O E. -0.68611
- The probability is 0.35 that a traffic fatality involves an intoxicated or alcohol-impaired driver or nonoccupant. In nine traffic fatalities, find the probability that the number, Y, which involve an intoxicated or alcohol-impaired driver or nonoccupant is a. exactly three; at least three; at most three. b. between two and four, inclusive. c. Find and interpret the mean of the random variable Y. d. Obtain the standard deviation of Y. a. The probability that exactly three traffic fatalities involve an intoxicated or alcohol-impaired driver or nonoccupant is enter your response here. (Round to four decimal places as needed.) Part 2 The probability that at least three traffic fatalities involve an intoxicated or alcohol-impaired driver or nonoccupant is enter your response here. (Round to four decimal places as needed.) Part 3 The probability that at most three traffic fatalities involve an intoxicated or alcohol-impaired driver or nonoccupant is enter your…The probabilities that the diameter of any item is less than, greater than or equal to some accepted value are respectively 0.05, 0.10 and 0.85. From the total lot, one selects 100 random samples. Find the probability that among them there will be five items with a smaller diameter and five with a larger diameter than the acceptable diameter.In a local university, 69% of the students live in the dormitories. A random sample of 80 students is selected for a particular study. We know that the standard error of the proportion is 0.0517. Find the probability that the sample proportion (the proportion living in the dormitories) is between 0.68 and 0.71. O 0.2272 O 0.4382 O 0.5618 O 0.7728
- The fraction of a large population that has a specific blood type T is .08 (8%). For blood donation purposes it is necessary to find 4 people with type T blood. If randomly selected individuals from the population are tested one after another, then (a) What is the probability y persons have to be tested to get 5 type T persons, and (b) What is the probability that over 80 people have to be tested?The number of students who fail per semester is often modeled as a Poisson random variable. Assume that on the average there are 5 students who fail per sem. a. What is the probability that there are exactly 5 students who fail in 1 sem? b. What is the probability that there are exactly 2 students in one academic year? c. What is the probability that there are at least 2 students who fail in one sem?10.2.% of the population is 65 or older . Find the probability that the following number of persons selected at random from 50 people are 65or older . The probability that at most 2 are 65 or older is ?
- Calculate the probability of a sample mean being at least as high as a specified value when σ is estimated?A financial firm is performing an assessment test and relies on a random sampling of their accounts. Suppose this firm has 60026002 customer accounts numbered from 00010001 to 60026002. One account is to be chosen at random. What is the probability that the selected account number is 29402940? answer:The probability is 0.35 that a traffic fatality involves an intoxicated or alcohol-impaired driver or nonoccupant. In six traffic fatalities, find the probability that the number, Y, which involve an intoxicated or alcohol-impaired driver or nonoccupant is a. exactly three; at least three; at most three. b. between two and four, inclusive. c. Find and interpret the mean of the random variable Y. d. Obtain the standard deviation of Y. Only typing answer Please explain step by step
