Statistics

posted by .

A multiple choice test has five choices. Therefore the probability of getting the correct answer by guessing is 0.2. The test has six questions. Use the binomial formula with n = 6 and p = 0.2 to (a) Determine probability of getting two questions correct.
(b)Determine probability of getting between one and four (inclusive) correct

  • Statistics -

    If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.

    2 correct = .2^2 * .8^4 = ?

    1 correct = .2 * .8^5 = ?

    3 correct = .2^3 * .8^3 = ?

    4 correct = .2^4 * .8^2 = ?

    Either-or probabilities are found by adding the individual probabilities, so add the probabilities you have found.

  • Statistics -

    A unbiased die is thrown seven times. Find the probability of throwing at least five six's.

  • Statistics -

    dk

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Algebra 1

    On a multiple choice test with 10 questions and 5 choices, A,B,C,D,E, for each questions, what are the odds of guessing on all 10 questions and getting 100%. State your answer as a common fraction. Thanks -Zach
  2. Stats

    An instructor gives a test with 20 multiple choice questions. There are 4 responses per questions and only one choice correct. The test also has 30 True/False questions. Determine the probability a student randomly guessing on all …
  3. statistic

    A multiple-choice test has 48 questions, each with four response choices. If a student is simply guessing at the answers, a. What is the probability of guessing correctly for any question?
  4. psychology statistics for behavioral sciences

    A multiple-choice test has 48 questions, each with four response choices. If a student is simply guessing at the answers, a. What is the probability of guessing correctly for any question?
  5. statistics

    A test consists of 12 multiple choice questions with 5 choices for each question. As an experiment, you GUESS on each and every answer without even reading the questions. Probability of getting less than 4 questions correct on this …
  6. statistics

    A multiple-choice test consists of 29 questions with possible answers of a, b, c, d. Estimate the probability that with random guessing, the number of correct answers is at least 14. z-value (Use continuity correction)= Probability=
  7. Discrete Math

    A multiple choice test consists of eight questions, each of which has five choices. Each question has exactly one correct answer. William guesses randomly at each answer. What is the probability that he gets six or fewer questions …
  8. Statistic

    test consists of 10 multiple choice questions with five choices for each question. As an experiment, you GUESS on each and every answer without even reading the questions. What is the probability of getting exactly 7 questions correct …
  9. Math

    There is a 100 question multiple choice test each with 5 choices. You randomly guess each question. Set up the binomial probability formula to find the probability of getting exactly 80 correct out of 100. Check to see if you can use …
  10. statistics

    Bill has completed a 10-question multiple-choice test on which he answered 7 questions correctly. Each question had one correct answer to be chosen from five alternatives. Bill says that he answered the test by randomly guessing the …

More Similar Questions