.2.15 e data and confidence level given below to complete parts (a) through (d)

Question

.2.15 e data and confidence level given below to complete parts (a) through (d) Use the sample data and confidence level given below to complete parts (a) through (d) A research institute poll asked respondents if they acted to annoy a bad driver. In the poll, n 420, and x= 1128 w Cick the icon to view a table of z scores. Click the icon to view a table of z scores a) Find the best point estimate of the population proportion p. 0466 Round to three decimal places as needed.) b) Identify the value of the margin of error E Round to four decimal places as needed.) Enter your answer in the answer box and then click Check Answer

Explanation / Answer

Margin of error for a 95% confidence interval

= 1.96 * SE

SE = sqrt ( p * (1-p) / n)

p = 1128 / 2420 = 0.4661

1-p = 0.5339

Thus, SE = 0.01014

Margin of error = 1.96 * 0.01014

= 0.0198

or 1.98%

Hope this helps.

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