Homework Answers
The statistical software output for this problem is :
P-value = 0.1117
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! Required information An article presents an analysis of the profit of international construction projects. In...
An article presents an analysis of the profit of international construction projects. In a sample of...
An article presents an analysis of the profit of international construction projects. In a sample of 126 projects, the average profit margin (in percent) was 8.27 with a standard deviation of 16.33. A test is made of H0 : μ ≥ 10 versus H1 : μ < 10. Find the P-value.
! Required information The following MINITAB output presents the results of a hypothesis test for a...
! Required information The following MINITAB output presents the results of a hypothesis test for a population mean u. One-Sample Z: X Test of mu = 45 Vs > 45 The assumed standard deviation = 5.0921 95% Lower Bound 45.5015 Variable X N 122 Mean 46.2598 St Dev 5.0921 SE Mean 0.4610 Z 2.73 P 0.003 0.003 NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Use the output...
A local newspaper article reported that at least 50% of the construction jobs in the metropolitan...
A local newspaper article reported that at least 50% of the construction jobs in the metropolitan New Orleans area are being filled by undocumented foreign workers. Anna Reed believes the actual percentage is much lower than that, and intends to challenge the newspaper’s figure. She took a random sample of 100 construction workers and found that 42 of them are undocumented. 1) What is the margin of error of the survey at the 95% level of confidence? 2) Find a...
---------------------------------------------------------------------------- ! Required information A new concrete mix is being designed to provide adequate compressive strength...
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! Required information A new concrete mix is being designed to provide adequate compressive strength for concrete blocks. The specification for a particular application calls for the blocks to have a mean compressive strength y greater than 1350 kPa. A sample of 100 blocks is produced and tested. Their mean compressive strength is 1353 kPa and their standard deviation is 74 kPa. A test is made of Ho: 415 1350 versus Hy: /> 1350. Find the P-value. Round the...
A 1992 article in the Journal of the American Medical Association ("A Critical Appraisal of 98.6...
A 1992 article in the Journal of the American Medical Association ("A Critical Appraisal of 98.6 Degrees F, the Upper Limit of the Normal Body temperature, and Other Legacies of Carl Reinhold August Wundrlich") reported body temperature, gender, and heart rate for a number of subjects. The temperatures for 25 female subjects follow: 97.5 97.2 97.4 97.6 97.8 97.9 98.0 98.0 98.1 98.1 98.2 98.3 98.3 98.4 98.4 98.4 98.5 98.6 98.6 98.7 98.8 98.8 98.9 98.9 99.0 Test the...
As the population ages, there is increasing concern about accident-related injuries to the elderly. An article...
As the population ages, there is increasing concern about accident-related injuries to the elderly. An article reported on an experiment in which the maximum lean angle-the farthest a subject is able to lean and still recover in one step-was determined for both a sample of younger females (21-29 years) and a sample of older females (67-81 years). The following observations are consistent with summary data given in the article: YF: 29, 36, 33, 27, 28, 32, 31, 36, 32, 26...
As the population ages, there is increasing concern about accident-related injuries to the elderly. An article...
As the population ages, there is increasing concern about accident-related injuries to the elderly. An article reported on an experiment in which the maximum lean angle-the farthest a subject is able to lean and still recover in one step-was determined for both a sample of younger females (21-29 years) and a sample of older females (67-81 years). The following observations are consistent with summary data given in the article: YF: 28, 36, 31, 27, 28, 32, 31, 36, 32, 26...
ignore the ones that are already answered. I need help on all An article in a...
ignore the ones that are
already answered. I need help on all
An article in a journal reports that 34% of American fathers take no responsibility for child care. A researcher claims that the figure is higher for fathers in the town of Littleton. A random sample of 225 fathers from Littleton yielded 90 who did not help with child care. Is there enough evidence to support the claim using a 4% level of significance? Enter the Null Hypothesis for...
A 1992 article in the Journal of the American Medical Association ("A Critical Appraisal of 98.6...
A 1992 article in the Journal of the American Medical Association ("A Critical Appraisal of 98.6 Degrees F, the Upper Limit of the Normal Body temperature, and Other Legacies of Carl Reinhold August Wundrlich") reported body temperature, gender, and heart rate for a number of subjects. The temperatures for 25 female subjects follow: 98.2 97.2 97.4 97.6 97.8 97.9 98.0 98.0 98.4 98.1 98.2 98.3 98.3 98.4 98.4 98.4 98.5 98.6 98.6 98.7 98.8 98.8 98.9 98.9 99.0 Test the...
A frequenter of a pub had observed that the new barman poured in average 0.47 liters...
A frequenter of a pub had observed that the new barman poured in average 0.47 liters of beer into the glass with a standard deviation equal to 0.18 liters instead of a half a liter with the same standard deviation. The frequenter had used a random sample of 45 glasses of beer in his experiment. Consider the one-sided hypothesis test for volume of beer in a glass: Ho: 0.5 agaist H1 0.5 Determine the P-value of this test. Round your...
! Required information The following MINITAB output presents the results of a hypothesis test for a population mean u. One-Sample Z: X Test of mu = 45 Vs > 45 The assumed standard deviation = 5.0921 95% Lower Bound 45.5015 Variable X N 122 Mean 46.2598 St Dev 5.0921 SE Mean 0.4610 Z 2.73 P 0.003 0.003 NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Use the output...
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! Required information A new concrete mix is being designed to provide adequate compressive strength for concrete blocks. The specification for a particular application calls for the blocks to have a mean compressive strength y greater than 1350 kPa. A sample of 100 blocks is produced and tested. Their mean compressive strength is 1353 kPa and their standard deviation is 74 kPa. A test is made of Ho: 415 1350 versus Hy: /> 1350. Find the P-value. Round the...
A 1992 article in the Journal of the American Medical Association ("A Critical Appraisal of 98.6 Degrees F, the Upper Limit of the Normal Body temperature, and Other Legacies of Carl Reinhold August Wundrlich") reported body temperature, gender, and heart rate for a number of subjects. The temperatures for 25 female subjects follow: 97.5 97.2 97.4 97.6 97.8 97.9 98.0 98.0 98.1 98.1 98.2 98.3 98.3 98.4 98.4 98.4 98.5 98.6 98.6 98.7 98.8 98.8 98.9 98.9 99.0 Test the...
As the population ages, there is increasing concern about accident-related injuries to the elderly. An article reported on an experiment in which the maximum lean angle-the farthest a subject is able to lean and still recover in one step-was determined for both a sample of younger females (21-29 years) and a sample of older females (67-81 years). The following observations are consistent with summary data given in the article: YF: 29, 36, 33, 27, 28, 32, 31, 36, 32, 26...
As the population ages, there is increasing concern about accident-related injuries to the elderly. An article reported on an experiment in which the maximum lean angle-the farthest a subject is able to lean and still recover in one step-was determined for both a sample of younger females (21-29 years) and a sample of older females (67-81 years). The following observations are consistent with summary data given in the article: YF: 28, 36, 31, 27, 28, 32, 31, 36, 32, 26...
ignore the ones that are
already answered. I need help on all
An article in a journal reports that 34% of American fathers take no responsibility for child care. A researcher claims that the figure is higher for fathers in the town of Littleton. A random sample of 225 fathers from Littleton yielded 90 who did not help with child care. Is there enough evidence to support the claim using a 4% level of significance? Enter the Null Hypothesis for...
A 1992 article in the Journal of the American Medical Association ("A Critical Appraisal of 98.6 Degrees F, the Upper Limit of the Normal Body temperature, and Other Legacies of Carl Reinhold August Wundrlich") reported body temperature, gender, and heart rate for a number of subjects. The temperatures for 25 female subjects follow: 98.2 97.2 97.4 97.6 97.8 97.9 98.0 98.0 98.4 98.1 98.2 98.3 98.3 98.4 98.4 98.4 98.5 98.6 98.6 98.7 98.8 98.8 98.9 98.9 99.0 Test the...
A frequenter of a pub had observed that the new barman poured in average 0.47 liters of beer into the glass with a standard deviation equal to 0.18 liters instead of a half a liter with the same standard deviation. The frequenter had used a random sample of 45 glasses of beer in his experiment. Consider the one-sided hypothesis test for volume of beer in a glass: Ho: 0.5 agaist H1 0.5 Determine the P-value of this test. Round your...
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