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Confidence interval for the proportion of adults

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In a nationwide poll of 1000 randomly sampled adults conducted in June 2011, 83% said they think children spend too much time on their computers and other electronic devices (but 37% say time spent on a computer is better than time spent in front of a TV).1

Find a 99% confidence interval for the proportion of adults who believe children spend too much time on electronic devices.Round your answers to three decimal places.

(a) What is the 99% confidence interval?

(b) What is the margin or error?

(c) Is it plausible that the proportion of all adults who feel this way is less than 79%?

(d) Is it plausible that the proportion is greater than 84%?

Reference no: EM131083910

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