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 60,139.7 and 3645.94 kilometers. Find a 95% lower confidence bound.for 20?. --- -- Report your answer to the nearest whole number.
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A: As per guideline éxpert have to answer first 3 subparts only.
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A: Given,sample size(n)=43sample mean(x¯)=15.2standard deviation(s)=3.16α=0.01
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A: Note: As per the guidelines, we are only allowed to solve three subparts, please post the other…
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A: Given Data: p=0.35 n=1000
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A: Given Information : It takes an average of 8.2 minutes for blood to begin clotting after an injury.…
Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…
A: Givensample size(n)=51Mean(x)=18.6standard deviation(s)=3.1significance level(α)=0.05
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A: From part (c) we have test statistic t = 2.072
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Q: It takes an average of 8 minutes for blood to begin clotting after an injury. An EMT wants to see if…
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A: The level of significance is 0.01.
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A: given data normal distributionμ = 146σ = 29.44P(x<190)= ?
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A: given that
Q: It takes an average of 8 minutes for blood to begin clotting after an injury. An EMT wants to see if…
A:
Q: It takes an average of 11.6 minutes for blood to begin clotting after an injury. An EMT wants to see…
A: The sample size n is 40.
Q: It takes an average of 14.6 minutes for blood to begin clotting after an injury. An EMT wants to see…
A:
Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…
A: Given: Population mean μ=19 Sample size n=51 Sample mean x=18.6 Sample standard deviation s=3.1…
Q: r blood to begin clotting after an injury. An EMT wants to see if the immediately told the truth…
A: According to guidelines we solve first three subparts when given multiple subparts.
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- The manager at UPS feels that the weights of packages shipped recently are less than in he past. Records show that in the past packages have had a population mean weight of 36.7 pounds and a population standard deviation of 14.2 pounds. A random sample of last month's shipping records yielded a sample mean weight of 32.1 pounds for 64 packages. Does this indicate that the weights of packages recently shipped is less than 36.7 pounds? Use a = 0.01. Use the Classical Approach.00 HI T R of of It takes an average of 13.2 minutes for blood to begin clotting after an injury. An EMT wants to see if the average will change if the patient is immediately told the truth about the injury. The EMT randomly selected 70 injured patients to immediately tell the truth about the injury and noticed that they averaged 13.4 minutes for their blood to begin clotting after their injury. Their standard deviation was 3.52 minutes. What can be concluded at the the a = 0.10 level of significance? %3D a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Select an answer O Select an answer C. The test statistic ? 0 is 0.475. Enter it here (please show your answer to 3 decimal places.) d. The p-value is 0.6360211626. Enter it here (Please show your answer to 4 decimal places.) e. The p-value is ? a f. Based on this, we should Select an answer the null hypothesis. g. Thus, the final conclusion is that O The data suggest the population mean…Mike thinks that there is a difference in quality of life between rural and urban living. He collects information from obituaries in
- Almost everyone who regularly drives his or her car in a large North American City agrees that traffic is getting worse. A randomly selected sample of 100 cars had their speeds measured on a freeway during rush hour. The sample mean is 17.2 mph (miles per hour). Traffic engineers determined that two years ago the mean and standard deviation of speeds on the same freeway during rush hour were 18.6 and 6.2 mph, respectively. Q6. Find the p-value of the test to determine how much evidence exists to support the generally held belief that traffic is getting worse. (Assume that the standard deviation of speeds today is unchanged from that of two years ago)In a population, the data value 180 has a z score of -0.8. The standard deviation of this population is 32.36. What is the mean of the population?A study compared the weight loss of people on a low-fat diet versus people on a low-carb diet. In a sample of 100 obese people on a low-fat diet the sample mean weight loss as 7.6 pounds with a standard deviation of 3.2 pounds. In another sample of 120 obese people on a low-carb diet the sample mean weight loss was 6.7 pounds with a standard deviation of 3.9 pounds. Write down all formulas and state the hypothesisa) Test the hypothesis, at the 5% level of significance, that there is a difference in the mean weightloss of using the 2 different diets. b) What is the p-value?
- It takes an average of 12.8 minutes for blood to begin clotting after an injury. An EMT wants to see if the average will change if the patient is immediately told the truth about the injury. The EMT randomly selected 51 injured patients to immediately tell the truth about the injury and noticed that they averaged 14.1 minutes for their blood to begin clotting after their injury. Their standard deviation was 4.48 minutes. What can be concluded at the the a = 0.01 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? v Select an answer V Hj: ? v Select an answer V c. The test statistic ? v = (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ? va f. Based on this, we should Select an answer v the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest the populaton mean is significantly different from 12.8 at a =…A clinic finds that the average patient stay is 5.7 hours with a standard deviation of 1.8. If a patient has a relative stay of 2.4, find how many hours the patient was in the clinic. Give a 2-decimal answerUse z scores to compare the given values. The tallest living man at one time had a height of 238 cm. The shortest living man at that time had a height of 142.4 cm. Heights of men at that time had a mean of 175.45 cm and a standard deviation of 5.59 cm. Which of these two men had the height that was more extreme? ... Since the z score for the tallest man is z = 0 and the z score for the shortest man is z = the man had the height that was Im- more extreme. (Round to two decimal places.) shortest tallest
- Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout. Suppose a friend tells you that the average length of trout caught in Pyramid Lake is ? = 19 inches. However, a survey reported that of a random sample of 46 fish caught, the mean length was x = 18.4 inches, with estimated standard deviation s = 2.7 inches. Do these data indicate that the average length of a trout caught in Pyramid Lake is less than ? = 19 inches? Use ? = 0.05. Solve the problem using the critical region method of testing (i.e., traditional method). (Round the your answers to three decimal places.) test statistic = critical value = State your conclusion in the context of the application. Reject the null hypothesis, there is sufficient evidence that the average fish length is less than 19 inches.Reject the null hypothesis, there is insufficient evidence that the average fish length is less than 19 inches. Fail to reject the null hypothesis, there is…It takes an average of 10.2 minutes for blood to begin clotting after an injury. An EMT wants to see if the average will decline if the patient is immediately told the truth about the injury. The EMT randomly selected 60 injured patients to immediately tell the truth about the injury and noticed that they averaged 10.1 minutes for their blood to begin clotting after their injury. Their standard deviation was 1.62 minutes. What can be concluded at the the a = 0.01 level of significance? a. For this study, we should use Select an answer b. The null and altemative hypotheses would be: Họ: Select an answer H1: ? Select an answer c. The test statistic (please show your answer to 3 decimal places.) d. The p-value = e. The p-value is (? va f. Based on this, we should Select an answer v the null hypothesis. g. Thus, the final conclusion is that .. (Please show your answer to 4 decimal places.) O The data suggest the population mean is not significantly less than 10.2 at a = 0.01, so there is…Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout. Suppose a friend tells you that the average length of trout caught in Pyramid Lake is ? = 19 inches. However, a survey reported that of a random sample of 51 fish caught, the mean length was x = 18.6 inches, with estimated standard deviation s = 3.1 inches. Do these data indicate that the average length of a trout caught in Pyramid Lake is less than ? = 19 inches? Use ? = 0.05. a) Estimate the P-value. select one:P-value > 0.0100.0010 < P-value < 0.010 0.250 < P-value < 0.00100.125 < P-value < 0.250P-value < 0.125 b) Sketch the sampling distribution and show the area corresponding to the P-value. c) will you reject or fail to reject the null hypothesis? Are the data statistically significant at level ??At the ? = 0.05 level, we reject the null hypothesis and conclude the data are statistically significant.At the ? = 0.05 level, we reject the null hypothesis and…
