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QUESTION 16 The distribution of total body protein in healthy adult men is approximately Normal with standard deviation o = 0.1 kg. Researchers found that the mean total body protein > of a random sample of 58 healthy adult men is 12.3 kg. Based on these data, a 95% confidence interval for u is 12.222 to 12.378 kg. 12.238 to 12.342 kg. 12.274 to 12.326 kg. 12.280 to 12.320 kg. QUESTION 17 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). Government regulations call for NOX emissions no higher than 0.3 g/mi. A random sample of 12 cars of this particular model is taken and is found to have a mean NOX emission of 0.298 g/mi. What is a 90% confidence interval for the mean NOX emission / of this particular model? 0.274 to 0.322 g/mi 0.272 to 0.324 g/mi 0.270 to 0.326 g/mi 0.266 to 0.330 g/mi QUESTION 18 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 * = 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? To answer this question, the appropriate null and alternative hypotheses, Ho and Ha , for u are Ho : H = 0.3 and Ha : H =0.3. Ho : H2 0.3 and Ha : H = 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 test statistic for the appropriate null and alternative hypotheses is Oz= -0.139. Oz = 0.139. Oz = 0.298. Oz = 0.445