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An investigation of past consumer surveys done by a company reveals that 2/3 of customers contacted...

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Basic Math

An investigation of past consumer surveys done by a companyreveals that 2/3 of customers contacted respond to the survey. Themarketing manager wants to do a new survey and plans to contact 198customers.

(a) How many responses should the manager expect to receive?

(b) Give an approximation of the probability that 140 or morecustomers will respond.

(c) Give an approximation of the probability that 135 to 150customers will respond.

(d) Give an approximation of the probability that 130 or lesscustomers will respond.

(e) Compare your approximate answers with the exact probabilityvalues obtained on Excel.

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