statistics

posted by .

Data shows that 93% of the people in a certain population are right-handed. A group of 9 people from this population are selected at random. What is the probability that exactly 7 of the people in the group are right-handed?
2

  • statistics -

    prob of right-handed = .93
    prob of NOT right-handed = .07

    prob (7 of 9 are right-handed)
    = C(9,7)(.93)^7(.07)^2
    = appr. 0.10614

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Statistics

    One-fifth of the population is left-handed. A random sample of 20 people is selected. a) What is the probability that no more than 6 of the next 20 people are left-handed. b) What is the probability that at least 4 of the next 20 people …
  2. statistics

    Data shows that 88% of the people in a certain population are right-handed. A group of 7 people from this population are selected at random. (a) What would be the expected value for the number of right-handed people in the group?
  3. statistics

    according to data from the american medical association, 10% of us are left handed. If three people, are randomly selected find the probability that they are all left handed. If groups of 50 people are randomly selected, what is the …
  4. statistics

    A specific study found that the average number of doctor visits per year for people over 55 is 8 with a standard deviation of 2. Assume that the variable is normally distributed. 1. Identify the population mean. 2. Identify the population …
  5. statistics

    A specific study found that the average number of doctor visits per year for people over 55 is 8 with a standard deviation of 2. Assume that the variable is normally distributed. 1. Identify the population mean. The population mean …
  6. probability

    90%of a countrys population are a right handed . what is the probability that exactly 29 people in a group of 30 are right handad?
  7. statistics

    Suppose that in a large population the proportion of people that have a certain disease is 0.01. Use the Poisson approximation to find the probability that at least four people will have the disease in a group of 400 randomly selected …
  8. math

    In the year 2003, the population of a certain district was 1.8 million. Thirty percent of the population was in the age group 15-40 years. In the same year, 120,000 people in the district the Voluntary Counseling and Testing (VCT) …
  9. math

    In the year 2003, the population of a certain district was 1.8 million. Thirty percent of the population was in the age group 15-40 years. In the same year, 120,000 people in the district the Voluntary Counseling and Testing (VCT) …
  10. Statistics

    A youth group has 7 boys and 5 girls. Experiment is select 5 people at random from the group. Let X be the number of boys in the selected 5 people. (a) Find the probability of exactly 1 boy, i.e., P([X = 1]). (b) Find the probability …

More Similar Questions