A survey of 477 Cook County residents is conducted, in which 150 of the respondents had shopped online in the last three months. What proportion of the respondents had shopped online? Give the proportion as a fraction. 150/477 Give the proportion as a percent, rounded to the nearest tenth of a percent. 31.4% In this problem, all of the conditions are met to construct a confidence interval using the method implemented on our calculator. Use your calculator to construct a 90% confidence interval for the proportion of all Cook County residents who had shopped online in the three months before the study.

(______________%, ___________________%)

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