It is necessary for an automobile producer to estimate the number of miles per gallon (mpg)...
It is necessary for an automobile producer to estimate the number of miles per gallon (mpg) achieved by its cars. Suppose that the sample mean for a random sample of 40 cars is 28.8 mpg and assume the standard deviation is 2.3 mpg. Now suppose the car producer wants to test the hypothesis that μ, the mean number of miles per gallon, is 29.3 against the alternative hypothesis that it is not 29.3. Conduct a test using a significance level of α=.05 by giving the following:
(a) The test statistic
(b) The P -value
(c) The final
conclusion is
A. There is not sufficient evidence to reject the
null hypothesis that μ=29.3.
B. We can reject the null hypothesis that
μ=29.3 and accept that μ≠29.3.
Homework Answers
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It is necessary for an automobile producer to estimate the
number of miles per gallon (mpg)...
(1 point) It is necessary for an automobile producer to estimate the number of miles per...
(1 point) It is necessary for an automobile producer to estimate the number of miles per gallon (mpg) achieved by its cars. Suppose that the sample mean for a random sample of 40 cars is 29.3 mpg and assume the standard deviation is 3.4 mpg. Now suppose the car producer wants to test the hypothesis that u, the mean number of miles per gallon, is 28.4 against the alternative hypothesis that it is not 28.4. Conduct a test using a...
(1 point) It is necessary for an automobile producer to estimate the number of miles per...
(1 point) It is necessary for an automobile producer to estimate the number of miles per gallon achieved by its cars. Suppose that the sample mean for a random sample of 130 cars is 28.2 miles and assume the standard deviation is 4 miles. Now suppose the car producer wants to test the hypothesis that u, the mean number of miles per gallon, is 30.9 against the alternative hypothesis that it is not 30.9. Conduct a test using a =...
(1 point) It is necessary for an automobile producer to estimate the number of miles per...
(1 point) It is necessary for an automobile producer to estimate the number of miles per gallon achieved by its cars. Suppose that the sample mean for a random sample of 100 cars is 30.6 miles and assume the standard deviation is 3 miles. Now suppose the car producer wants to test the hypothesis that u, the mean number of miles per gallon, is 30.4 against the alternative hypothesis that it is not 30.4. Conduct a test using a =...
(1 point) It is necessary for an automobile producer to estimate the number of miles per...
(1 point) It is necessary for an automobile producer to estimate the number of miles per gallon achieved by its cars. Suppose that the sample mean for a random sample of 120 cars is 27.4 miles and assume the standard deviation is 3.5 miles. Now suppose the car producer wants to test the hypothesis that u, the mean number of miles per gallon, is 25.2 against the alternative hypothesis that it is not 25.2. Conduct a test using a05 by...
It is necessary for an automobile producer to estimate the mean number of miles per gallon...
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LaTech Stat Ch6: Problem 4 gallon achieved by its cars. Suppose that the sample mean for...
LaTech Stat Ch6: Problem 4 gallon achieved by its cars. Suppose that the sample mean for a randorm sample of 100 cars is 29.7 miles and assume the standard deviation is 3.6 miles. Now suppose the car producer wants to test the hypothesis that , the mean number of miles per gallon, is 27 against the alternative hypothesis that it is not 27. Conduct a test using a 05 by giving the following OA.We can reject the null hypothesis that...
An automobile manufacturer claims that their car has a 56.7 miles/gallon (MPG) rating. An independent testing...
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An automobile manufacturer claims that its van has a 36.2 miles/gallon (MPG) rating. An independent testing...
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2) In order to develop a confidence interval for the average miles per gallon (MPG) for...
2) In order to develop a confidence interval for the average miles per gallon (MPG) for a brand of hybrid car, a simple random sample of 97 cars is selected from the population of 10,000 cars manufactured. The 97 cars had a sample mean MPG of 51.9 MPG and a sample standard deviation of 4.5 MPG. (6 points) a) Compute a 99% confidence interval for the average miles per gallon (MPG) for this brand of car. b) Imagine that an...
Question 17 8 pts A test team takes readings from the miles per gallon (mpg) estimate...
Question 17 8 pts A test team takes readings from the miles per gallon (mpg) estimate reading in a new car while driving at 60 mph. The sample consists of 30 readings and has a mean of 31.3 mpg and a standard deviation of 11.7 mpg. The average mpg of all new cars is 27.6 mpg although the standard deviation is unknown. Determine the 95% confidence interval for the true miles per gallon for the new cars. HTML Editori Β...
(1 point) It is necessary for an automobile producer to estimate the number of miles per gallon (mpg) achieved by its cars. Suppose that the sample mean for a random sample of 40 cars is 29.3 mpg and assume the standard deviation is 3.4 mpg. Now suppose the car producer wants to test the hypothesis that u, the mean number of miles per gallon, is 28.4 against the alternative hypothesis that it is not 28.4. Conduct a test using a...
(1 point) It is necessary for an automobile producer to estimate the number of miles per gallon achieved by its cars. Suppose that the sample mean for a random sample of 130 cars is 28.2 miles and assume the standard deviation is 4 miles. Now suppose the car producer wants to test the hypothesis that u, the mean number of miles per gallon, is 30.9 against the alternative hypothesis that it is not 30.9. Conduct a test using a =...
(1 point) It is necessary for an automobile producer to estimate the number of miles per gallon achieved by its cars. Suppose that the sample mean for a random sample of 100 cars is 30.6 miles and assume the standard deviation is 3 miles. Now suppose the car producer wants to test the hypothesis that u, the mean number of miles per gallon, is 30.4 against the alternative hypothesis that it is not 30.4. Conduct a test using a =...
(1 point) It is necessary for an automobile producer to estimate the number of miles per gallon achieved by its cars. Suppose that the sample mean for a random sample of 120 cars is 27.4 miles and assume the standard deviation is 3.5 miles. Now suppose the car producer wants to test the hypothesis that u, the mean number of miles per gallon, is 25.2 against the alternative hypothesis that it is not 25.2. Conduct a test using a05 by...
LaTech Stat Ch6: Problem 4 gallon achieved by its cars. Suppose that the sample mean for a randorm sample of 100 cars is 29.7 miles and assume the standard deviation is 3.6 miles. Now suppose the car producer wants to test the hypothesis that , the mean number of miles per gallon, is 27 against the alternative hypothesis that it is not 27. Conduct a test using a 05 by giving the following OA.We can reject the null hypothesis that...
An automobile manufacturer claims that their car has a 56.7 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this car. After testing 14 cars they found a mean MPG of 56.6 with a standard deviation of 1.1. Is there sufficient evidence at the 0.1 level that the cars underperform the manufacturer's MPG rating? Assume the population distribution is approximately normal. Step 1 of 5: State the null and alternative hypotheses. Answer 2 Points...
An automobile manufacturer claims that its van has a 36.2 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this van since it is believed that the van has an incorrect manufacturer's MPG rating. After testing 220 vans, they found a mean MPG of 36.0. Assume the variance is known to be 4.41. A level of significance of 0.05 will be used. Make a decision to reject or fail to reject the null hypothesis...
2) In order to develop a confidence interval for the average miles per gallon (MPG) for a brand of hybrid car, a simple random sample of 97 cars is selected from the population of 10,000 cars manufactured. The 97 cars had a sample mean MPG of 51.9 MPG and a sample standard deviation of 4.5 MPG. (6 points) a) Compute a 99% confidence interval for the average miles per gallon (MPG) for this brand of car. b) Imagine that an...
Question 17 8 pts A test team takes readings from the miles per gallon (mpg) estimate reading in a new car while driving at 60 mph. The sample consists of 30 readings and has a mean of 31.3 mpg and a standard deviation of 11.7 mpg. The average mpg of all new cars is 27.6 mpg although the standard deviation is unknown. Determine the 95% confidence interval for the true miles per gallon for the new cars. HTML Editori Β...
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