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Using Normal Approximation. In Exercises 5–8, do the following: If the requirements of np ≥ 5 and nq ≥ 5 are both satisfied, estimate the indicated probability by using the
8. Guessing on Standard Tests With n = 50 guesses and p = 0.2 for a correct answer, find P(exactly 12 correct answers).
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Chapter 6 Solutions
Elementary Statistics (13th Edition)
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- Assume that the probability that an airplane engine will fail during a torture test is 12and that the aircraft in question has 4 engines. Construct a sample space for the torture test. Use S for survive and F for fail.arrow_forwardb. Let X be a random variable with a mean of 50 and a variance of 64. Find: i. P(x < 52) ii. P(35 < X < 64)arrow_forwardTable 4 is the probability table for a random variable X. Find E(X), Var(X), and the standard deviation of X. Table 4 Outcome Probability 1,arrow_forward
- e. Find the variance and standard deviation of the probability distribution of the random variable X if P(X) x+1 * for X = 1,2, 3, 4, and 5. 20arrow_forwardSuppose a discrete random variable X takes only three values 0, 2 and 3. If P(0)=0.5, P(2)=0.2 and P(3)=D0.3 then P(X>1) is equal to: Select one: a. 0.3 b. 0.2 C. 0.5 d. 0arrow_forwardPlease answer c,darrow_forward
- College Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage LearningHolt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL
- Algebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:Cengage
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