# ch_4b - a(b the standard deviation for the number of...

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Chapter 5 MATH - 200 Form B 1. 12% of articles submitted to a journal are accepted for publication. Find the probability that in a random sample of 8 articles submitted to this journal exactly 3 will be accepted for publication. ______________________ 2. Find the mean, standard deviation, and variance for the accompanying probability distribution. x P(x) 1 0.10 2 0.15 3 0.20 4 0.29 5 0.26 mean: _______________ standard deviation: _______________ variance: _______________

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3. A company testing batteries in batches of 13 and there is a 30% rate of defects. (a)the mean number of failures per batch.
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Unformatted text preview: a. ______________ (b) the standard deviation for the number of failures per batch. b. ______________ (c) the probability that in the batch of 13 computers, exactly three will fail. c. ______________ (d) the probability that in the batch of 13 computers, at least two will fail. d. _____________ d. _______________ 4. An investor has a 0.60 probability of making \$25,000, a 0.30 probability of losing \$10,000, and a 0.10 probability of breaking even. What is the expected value? _________________________...
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ch_4b - a(b the standard deviation for the number of...

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