0 Question 2 B 0/4 pts '0 2 (9 Details The data below was collected from manufacturer advertisements of their vehicles horsepower and highway gas mileage (mpg.). Use this data to answer the following questions. um- Ina-\"Ila 1. Find the the correlation coefficient. Round your final answer to four decimal places. Write the regression equation below. Round all numbers to four decimal places. 3. Using the data shown above,predict the the highway gas mileage (mpg) for a car that has a horsepower of 225. Round your final answer to two decimal places. 4. What percentage of variation in highway gas mileage (mpg) can be explained by horsepower? Round your final answer to two decimal places. % T) 0 Question 4 8 0'4 pts '0 2 G) Details You are concerned that nausea may be a side effect of Tamiflu, but you cannot just give Tamiu to patients with the flu and say that nausea is a side effect if people become nauseous. This is because nausea is common for people who have the flu. From past studies you know that about 30% of people who get the flu experience nausea. You collected data on 1807 patients who were taking Tamiflu to relieve symtoms of the flu, and found that 602 experienced nausea. Use a 0.01 significance level to test the claim that the percentage of people who take Tamiflu for the relief of flu symtoms and experience nausea is greater than 30%. a) Identify the null and alternative hypotheses? Hui-C] IrvQ b]: What type of hypothesis test should you conduct {left-, right-, or two-tai led }? O left-tailed O right-tailed O two-tai led c) Identify the appropriate significance level. C] d} Calculate your test statistic (use 33 rounded to 4 decimal places). Round your test statistic to 4 decimal places. D e) Calculate your p-value and round to 4 decimal places. f] Do you reject the null hypothesis? 0 We reject the null hypothesis, since the p-value is less than the significance level. 0 We reject the null hypothesis, since the p-value is not less than the significance level. 0 We fail to reject the null hypothesis, since the p-value is less than the significance level. 0 We fail to reject the null hypothesis, since the p-value is not less than the significance level. g) Select the statement below that best represents the conclusion that can be made. 0 There is sufficient evidence to warrant rejection of the claim that the percentage of people who experience nausea is greater than 30%. 0 There is not sufficient evidence to warrant rejection of the claim that the percentage of people who experience nausea is greater than 30%. O The sample data support the claim that the percentage of people who experience nausea is greater than 30% 0 There is not sufficient sample evidence to support the claim that the percentage of people who experience nausea is greater than 30% 0 Question 6 8 OH pts '0 2 G) Details 2.38 Baggage fees: An airline charges the following baggage fees: $25 for the first bag and an extra $35 for the second. Suppose 54% of passengers have no checked luggage, 34% have only one piece of checked luggage and 12% have two pieces. We suppose a negligible portion of people check more than two bags. a) The average baggage-related revenue per passenger is: $ :] (please round to the nearest cent) b) About how much revenue should the airline expect for a flight of 120 passengers? 5 :] (please round to the nearest dollar) 0 Question 7 8 DH pt '0 2 G) Details The boxplot below shows salaries for Construction workers and Teachers. Construction Teacher | I I l i I I I 20 25 30 35 40 45 50 55 Salary [' thousands of$) Q If a person is making the first quartile salary for a construction worker, they are making more than what percentage of Teachers? They are making more than C] 96 of Teachers. Check Answer . Question 8 0/2 pts 9 2 0 Details If n = 580 and p (p-hat) = 0.8, construct a 9% confidence interval. Give your answers to three decimals