One of the major benefits of e-mail is that it makes it possible to communicate rapidly without getting a busy signal or no answer, two major criticisms of telephone calls. But does e-mail succeed in helping solve the problems people have trying to run computer software? A study polled the opinions of consumers who had tried to use e-mail to obtain help by posting a message online to their PC manufacturer or authorized representative. Results are shown in the following table.

As marketing manager for a large PC manufacturer, you decide to conduct a survey of your customers comparing your e-mail records against the published results. To ensure a fair comparison, you elect to use the same questionnaire and examine returns from 500 customers who attempted to use e-mail to get help from your technical support staff. The results follow:

Does the distribution of responses differ from the distribution obtained from the published survey? Test at the 0.01 level of significance.
a. Solve using the p-value approach.
b. Solve using the classical approach.

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Result of Online Query Never got a response Got a response, but it didn't help Response helped, but didn't solve problem Response solved problem Percent 30 34 Result of Online Query Never got a response Got a response, but it didn't help Response helped, but didn't solve problem Response solved problem umber Responding 35 102 125 238 Total 500