help please in this homeowork
3 Blackboard X A Multiple Attempts Not allowed. This test can only be taken once. Force Completion This test can be saved and resumed at any point until time has expired. The timer will continue to run if you leave the test. Remaining Time: 1 hour, 58 minutes, 10 seconds. Question Completion Status: Close Window > Moving to another question will save this response. > Question 7 1 points Save Answer The developer of an energy-efficient lawnmower engine claims that the engine will run continuously for 300 minutes on a single gallon of regular gasoline. Suppose a simple random sample of 50 engines is tested. The engines run for an average of 295 minutes, and the population standard deviation sigma is known to be 20 minutes. Test the null hypothesis that the mean run time is 300 minutes against the alternative hypothesis that the mean run time is not 300 minutes. Use a 0.05 level of significance. State your conclusion: a. There is sufficient evidence that the mean run time for all lawn mower engines is 300 mins. O c. There is insufficient evidence that the mean run time for all lawn mower engines is different from 300 minutes. Od. the mean runtime for all lawn mower engines is equal to 295 minutes. O e. The correct answer does not appear as one of the choices 2.015; our conclusion is fail to reject Ho. c. reject Ho if to 2.571; our conclusion is reject Ho. > Question 6 1 points Save Answer The developer of an energy-efficient lawnmower engine claims that the engine will run continuously for 300 minutes on a single gallon of regular gasoline. Suppose a simple random sample of 50 engines is tested. The engines run for an average of 295 minutes, and the population standard deviation sigma is known to be 20 minutes. Test the null hypothesis that the mean run time is 300 minutes against the alternative hypothesis that the mean run time is not 300 minutes. Use a 0.05 level of significance. State the critical value(s) for this test O a z= + 1.645 O b. 1 = + 2.093 c. The correct answer does not appear as one of the choices O d. z = + 2.326 Oe. z= = 1.96 > Question 4 1 points Save Arsurer The developer of an energy-efficient lawnmower engine claims that the engine will run continuously for 300 minutes on a single gallon of regular gasoline. Suppose a simple random sample of 50 engines is tested. The engines run for an average of 295 minutes, and the population standard deviation sigma is known to be 20 minutes. Test the null hypothesis that the mean run time is 300 minutes against the alternative hypothesis that the mean run time is not 300 minutes. Use a 0.05 level of significance. Calculate the test statistic. a. The correct answer does not appear as one of the choices O b. z = 1.96 O c. z= - 1.768 O d. z = +1.867 O e. z = 1.768 4 Question 11 1 points Save Answer Of all the luggage handled by the airlines at JFK in the last 2 years, 13% was lost or stolen or damaged. Consider a randomly selected sample of 1500 pieces of outgoing luggage at JFK. International Airport. Since we can view this as 1500 independent Bemoulli trials, this will be considered a binomial experiment. We shall use the Normal Approximation to the Binomial to find the probability that strictly less than 160 pieces of luggage will be lost or stolen or damaged. After a continuity correction, we would be computing: O a. P(X Moving to another question will save this response. A Moving to another question will save this response. Close MacBook Air3 Blackboard O A Multiple Attempts Not allowed. This test can only be taken once. Force Completion This fest can be anved and resumed at any point until time has expired. The timer will continue to run if you leave the test. Remaining Time: 1 hour, 57 minutes, 59 seconds. Question Completion Status: Close Window A Moving to another question will save this response. it Quntion B of 41 2 29 Question 8 1 points Save Answer Of all the luggage handled by the airlines at JFK in the last 2 years, 13% was lost or stolen or damaged. Consider a randomly selected sample of 1500 pieces of outgoing luggage at JFK International Airport. Since we can view this as 1500 independent Bernoulli trials, this will be considered a binomial experiment. The mean of the binomial distribution is given by: O a. 165 O b. 150 OG.O O d. 195 e. The correct answer does not appear as one of the choices Ly Moving to another question will save this response. Close Window MacBook AirAttempts Force Completion This test can be saved and resumed at any point until time has expired. The timer will continue to run If you leave the test. Remaining Time: 1 hour, 57 minutes, 06 seconds. * Question Completion Status: Close Window Ly Moving to another question will save this response. Moving to another question will save this response. 20 Question 5 1 points Save Arawer The developer of an energy-efficient lawnmower engine claims that the engine will run continuously for $00 minutes on a single gallon of regular gasoline. Suppose a simple random sample of 50 engines is tested. The engines run for an average of 295 minutes, and the population standard deviation sigma is known to be 20 minutes. Test the null hypothesis that the mean run time is 300 minutes against the alternative hypothesis that the mean run time s not 300 minutes. Use a 0.05 level of significance. Estimate the p-value for this test. a. .0248 O b. .9232 O C. .0384 O d. .9616 O e. .0768 Moving to another question will save this response.
