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QUESTION 20 The level of nitrogen oxides (NOX) in the exhaust of cars of a particular model varies Normally with standard deviation o =0.05 grams per mile (g/mi). A random sample of 12 cars of this particular model is taken and is found to have a mean NOX emission of x = 0.298 g/mi. Government regulations call for NOX emissions no higher than 0.3 g/mi. Do the data provide evidence that this particular meets the government regulation? The P-value for the appropriate null and alternative hypotheses is 0. 139. 0.222. 0.445. 0.889. QUESTION 21 The level of nitrogen oxides (NOX) in the exhaust of cars of a particular model varies Normally with standard deviation o =0.05 grams per mile (g/mi). A random sample of 12 cars of this particular model is taken and is found to have a mean NOX emission of x = 0.298 g/mi. Government regulations call for NOX emissions no higher than 0.3 g/mi. Do the data provide evidence that this particular meets the government regulation? You conclude from these data that the null hypothesis is proved at significance level 5%. the alternative hypothesis is proved at significance level 5%. there is evidence supporting the alternative hypothesis at significance level 5%. there is not enough evidence to reject the null hypothesis at significance level 5%. QUESTION 22 When performing a test of hypotheses, a Type 1 error occurs when we incorrectly reject the null hypothesis. accept the null hypothesis reject the alternative hypothesis. accept the alternative hypothesis. QUESTION 23 A researcher plans to conduct a test of hypotheses at the a = 0.05 significance level. She designs her study to have a power of 0.80 at a particular alternative value of the parameter of interest. The probability that the researcher will commit a Type I error is 0.05. 0.20 0.80 equal to the P-value and cannot be determined until the data have been collected