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Question: In a CBS News/New York Times nationwide poll done in 2009, the proportion of respondents who thought that it should be illegal to use a handheld cellular telephone while driving a car was .80 (80%). The poll's sample size was 829 (Source: www.pollingreport.com/transpor .htm#Road).
a. Find the value of the standard error of the sample proportion.
b. Find a 95% confidence interval estimate of the population proportion who think that it should be illegal to use a cellular telephone while driving.
c. Find a 98% confidence interval estimate of the population proportion who think that it should be illegal to use a cellular telephone while driving.
d. Which of the intervals calculated in parts (b) and (c) is wider-the interval with 95% confidence or the interval with 98% confidence?
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a draw thenbspscatter plotnbspfor the variables.b compute thenbspcorrelation coefficient. usenbspthree
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Random for a mosquito count, find the probability that the average of those counts is more than 101.6 mosquitos per square meter. Assume that the variable is normally distributed.
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Describe a 5-step hypothesis test for two variances for a particular claim related to your work or life environment. You need to state the claim, define the null and alternate hypothesis, identify the test significance and the test statistic, and ..
a. State the null and alternative hypotheses to be tested. b. Compute the test statistic. c. The null hypothesis is to be tested at 95% confidence. Determine the critical value(s) for this test.
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