Last year, 14,000 Internet users were surveyed and asked about their willingness to pay fees for access to websites. Of these, 3,500 were definitely not willing to pay such fees.

Fill in Multiple Blanks

a. A 95% confidence interval for the proportion definitely unwilling to pay fees is from percent to percent. In your answers, use percentages, that is,the estimated proportion *100. Show one (1) digitto the right of the decimal point, for example, 52.0, 52.1. Apply the appropriate rounding rule if necessary.

b. How large a sample is necessary to estimate the proportion of interest to within 2% in a 95% confidence interval?