In 2007 poll of 2200 adults 45.3% of respondents were in favorof allowing studen

Question

In 2007 poll of 2200 adults 45.3% of respondents were in favorof allowing student to use cell phone during tests. 1. What is a point estimate for the proportion that infavor of students to use cell phone during test?____. 2. Find 99% confidence interval for the true proportionof adults who are in favor of students to use cell phone duringtest?________________. In 2007 poll of 2200 adults 45.3% of respondents were in favorof allowing student to use cell phone during tests. 1. What is a point estimate for the proportion that infavor of students to use cell phone during test?____. 2. Find 99% confidence interval for the true proportionof adults who are in favor of students to use cell phone duringtest?________________.

Explanation / Answer

1. The point estimate is simply the percent of respondents thatfavor students using cell phones during the test. So theproportion is .453 2. The formula is 99%CI = proportion (+/-) (z*)(sqrt((proportion)(1-proportion)/n)) The 99% CI is = .453 (+/-) (2.57598) (sqrt(((.453)(1-.453))/2200) 99% CI = (.42566,.48034) I hope this helps

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