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7 years ago
The probability of success on any trial of a binomial experiment is 20. Find the probability that the proportion of success in a sample of 400 is:
 a. less than 18.
  b. more than 18.
  c. between 18 and 22.
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wrote...
7 years ago
a. 0.1587
b. 0.8413
c. 0.6826
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