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Mathematics, 10.03.2020 08:04 leannaadrian
A recent study by Allstate Insurance Co. finds that 82% of teenagers have used cell phones while driving (The Wall Street Journal, May 5, 2010). In October 2010, Massachusetts enacted a law that forbids cell phone use by drivers under the age of 18. A policy analyst would like to determine whether the law has decreased the proportion of drivers under the age of 18 who use a cell phone.
Suppose a sample of 200 drivers under the age of 18 results in 150 who still use a cell phone while driving. What is the value of the test statistic? What is the p-value? (Negative values should be indicated by a minus sign. Round your intermediate calculations to 4 decimal places. Round "test statistic" to 2 decimal places and "p-value" to 4 decimal places.)
Test using the critical value approach with ? = 0.05. critical value=?
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