What is the probability that 15​,16​,17​,18​, or 19npeople in the sample are in favor of retaining the​ euro?

57. A marketing company estimates about 35% of the population is interested in purchasing a vehicle within the next year. What is the probability a random sample of 81 individuals will have more than 38% of it interested in purchasing a vehicle in the next year? 0.7158 0.2857 0.7054 0.2946

7) Suppose that 40% of all college freshmen gain weight. A sample of 15 is selected randomly. What is the probability that exactly two-fifths of the freshmen gain weight ?

13) Approximately 59.4% of adults have added bleach to their laundry. Assume six adults are randomly selected. Find the probability that at most one adult have added bleach to their laundry. Round the answer to four decimals digits.

4. Laptop buyers can pay their purchases in cash, or using a credit card, or a debit card. The manager observed that 55% of the shoppers used credit cards, 15% paid in cash, and the rest paid with their debit cards. a. Write the sample space: b. Assign the probability for each sample space.

10. Ten percent of computer parts produced by a certain supplier are defective. What is the probability that a sample of 10 parts contains more than 3 defective ones?

Approximately 20% of U.S. workers are afraid that they will never be able to retire. Suppose 10 workers are randomly selected. a. What is the probability that none of the workers is afraid that they will never be able to retire? (Note: without calculation process, no credit)  b. What is the probability that at least two of the workers are afraid that they will never be able to retire? (Note: without calculation process, no credit) c. What is the probability that no more than two of the workers are afraid that they will never be able to retire? (Note: without calculation process, no credit) d. Calculate the expected value, the variance, and the standard deviation of this binomial probability distribution.

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6. Clinical trials have shown that 90% of the patients with severe migraine experience relief of their pain after taking the drug Nimodipine. Suppose 15 migraine patients try Nimodipine. a. What is the probability all of the patients experience relief? b. What is the probability only 10 patients experience relief? What is the probability at least 12 patients experience relief? d. What is the probability at most 10 patients experience relief? e. How many are expected to experience relief?

7. Aaron purchased 19 video games. The defect rate for these types of video games is 1.8%. What is the probability that at least three of the video games he purchased are defective?