Homework Answers
P-value > 0.05, Do not reject null hypothesis
There is not enough evidence to conclude that the population standard deviation of the tire life is less than 4000 at the 0.05 significance level
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and with minitab please.
• A clear, written interpretation of the test's meaning in terms of...
A research engineer for a tire manufacturer is investigating tire life for a new rubber compound...
A research engineer for a tire manufacturer is investigating tire life for a new rubber compound and has built 16 tires and tested them to end-of-life in a road test. The sample mean and standard deviation are 60139.7 and 3645.94 kilometers. The engineer would like to demonstrate that the mean life of this new tire is in excess of 60,000 kilometers. Formulate and test appropriate hypotheses, and draw conclusions using a = 0.05.
statistics and probability
A research engineer for a tire manufacturer is investigating tire life for a new rubber compound. He has built 16 tires and tested them to end-of-life in a road test. The sample mean and standard deviation are 60,139.7 and 3645.94 kilometers. Compute a 95% tolerance interval on the life of the tires that has confidence level 95%. Compare the length of the tolerance interval with the length of the 95% CI on the population mean. Which interval is shorter? Discuss...
Hypothesis Testing 02 (when o is unknow b) A research engineer for a tire manufacturer is investigating the tire li...
Hypothesis Testing 02 (when o is unknow b) A research engineer for a tire manufacturer is investigating the tire life for a new rubber compound and has built 10 tires and tested them to end-of-life in a road test. The sample mean and standard deviation are: 60,139.7 km and s = 3645.94 km. Write down the null and alternative hypotheses to test if the mean tire life is less than 61,000 km b. What is the type of statistical test...
Can Anyone help me with these 7 questions? Questions: Q1. A random sample has been taken...
Can
Anyone help me with these 7 questions?
Questions: Q1. A random sample has been taken from a normal distribution and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05) (a) What is the value of the sample mean? (b) One of these intervals is a 95% CI and the other is a 90% CI. Which one is the 95% CI? Why? Q2. A civil engineer is analyzing the compressive strength of concrete. Compressive strength...
The Rogers Bicycle & Gun Company sells a light, new road tire that they advertise to...
The Rogers Bicycle & Gun Company sells a light, new road tire that they advertise to go over 5,000 miles before it must be replaced. Several of the company’s customers have complained that the new tire does not actually make it to 5,000 miles. The company decided to test the tires. They tested a sample of 25 tires and found the average tire life to be 4,300 miles with a standard deviation of 500 miles. It will cost the company...
Context: The life in hours of a thermocouple used in a furnace is known to be...
Context: The life in hours of a thermocouple used in a furnace is known to be approximately normally distributed, with standard deviation of 20 hours. A random sample of 15 thermo- couples resulted in the following data: 553, 552, 567, 579, 550, 541, 537, 553, 552, 546, 538, 553, 581, 539, 529. Is there evidence to support the claim that mean life exceeds 540 hours? Use Minitab for the computations for this problem. The data set is on Canvas. Copy/paste...
When consumers apply for credit, their credit is rated using FICO scores. A random sample of...
When consumers apply for credit, their credit is rated using FICO scores. A random sample of credits ratings is obtained, and the FICO scores are summarized with these statistics: n = 18, x ̅=660.3, s = 75.9. Use a 0.05 significance level to test the claim that these credit ratings are from a population with a mean that is equal to 700. 1. Copy and paste the Minitab output for exercise into the document underneath the problem. You are not also...
please show all work and steps Minitab Problem 3 Imagine choosing n = 16 women at...
please show all work and steps
Minitab Problem 3 Imagine choosing n = 16 women at random from a large population and measuring their heights. Assume that the heights of the women in this population are normal, with u = 64 inches and o= 3 inches. Suppose you then test the null hypothesis Ho: u=64 versus the alternative that Hi: u #64, using a=0.10. Assume o is known. Simulate the results of doing this test 20 times by generating 20...
Please write the answers clear and easy to be read and please sipirt the answers so It would be i...
Please write the answers clear and easy to be read and please sipirt the answers so It would be in order Researchers combined the results from three experiments to investigate whether chest compression only (CC) would improve a heart attack victim's chance of survival compared to standard cardiopulmonary resuscitation (CPR). In each experiment, the emergency services dispatcher randomly assigned either the CC or CPR instructions to a bystander who was at a site where a person had just experienced a...
New automobile tires, manufactured by a company in Lake Charles, are designed to provide a mean...
New automobile tires, manufactured by a company in Lake Charles, are designed to provide a mean of at least 50,000 miles. Marissa Manuel, who is Production Manager, tested a random sample of tires and obtained the following descriptive statistics: ▪ Sample size: n =36 tires ▪ Sample mean: x̄ = 50,900 miles, and ▪ Sample standard deviation: s= 3,000 miles. (1) Construct a 95% confidence interval for the mean length of life μ of all automobile tires. (2) Test the...
Hypothesis Testing 02 (when o is unknow b) A research engineer for a tire manufacturer is investigating the tire life for a new rubber compound and has built 10 tires and tested them to end-of-life in a road test. The sample mean and standard deviation are: 60,139.7 km and s = 3645.94 km. Write down the null and alternative hypotheses to test if the mean tire life is less than 61,000 km b. What is the type of statistical test...
Can
Anyone help me with these 7 questions?
Questions: Q1. A random sample has been taken from a normal distribution and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05) (a) What is the value of the sample mean? (b) One of these intervals is a 95% CI and the other is a 90% CI. Which one is the 95% CI? Why? Q2. A civil engineer is analyzing the compressive strength of concrete. Compressive strength...
Context: The life in hours of a thermocouple used in a furnace is known to be approximately normally distributed, with standard deviation of 20 hours. A random sample of 15 thermo- couples resulted in the following data: 553, 552, 567, 579, 550, 541, 537, 553, 552, 546, 538, 553, 581, 539, 529. Is there evidence to support the claim that mean life exceeds 540 hours? Use Minitab for the computations for this problem. The data set is on Canvas. Copy/paste...
please show all work and steps
Minitab Problem 3 Imagine choosing n = 16 women at random from a large population and measuring their heights. Assume that the heights of the women in this population are normal, with u = 64 inches and o= 3 inches. Suppose you then test the null hypothesis Ho: u=64 versus the alternative that Hi: u #64, using a=0.10. Assume o is known. Simulate the results of doing this test 20 times by generating 20...
Please write the answers clear and easy to be read and please sipirt the answers so It would be in order Researchers combined the results from three experiments to investigate whether chest compression only (CC) would improve a heart attack victim's chance of survival compared to standard cardiopulmonary resuscitation (CPR). In each experiment, the emergency services dispatcher randomly assigned either the CC or CPR instructions to a bystander who was at a site where a person had just experienced a...
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