In each of Exercises 14 1 through 14 3 X is a count Does X...
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In each of Exercises 14 1 through 14 3 X is a count Does X have a binomial distribution Give your reasons in each case 14 1 Working Cell Numbers When an opinion poll selects cell phone numbers at random to dial the cell phone exchange is first selected and then random digits are added to form a complete telephone number see Example 8 5 page 212 When using this procedure to generate random cell phone numbers approxi mately 55 of the cell numbers generated correspond to working numbers You watch a pollster dial 15 cell numbers that have been selected in this manner X is the number that correspond to a working number
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