Question 12 4 4 points two different analytical tests

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Week 7 Test 2 Complete.docx

Question 11   4 / 4 points Cycling performance before and after an eight week leg - strength training was studied . Seven males performed leg - strength training three days per week for eight weeks . Peak power during incremental cycling increased to a mean of 315 watts with a standard deviation of 16 watts . Is there evidence that leg strength exceeds 300 watts at significance level 0.05 ? Find the P-value .
A ) Reject the null , p- value between .01 and .025
B ) Reject the null , p- value equals .05
C ) Fail to reject the null , p- value between .025 and .05
D ) Fail to reject the null , p- value equals . 025
Question 12   4 / 4 points Two different analytical tests can be used to determine the impurity level in steel alloys . Eight specimens are tested using both procedures , and the results are shown in the following tabulation . Use alpha=0.01 . Determine the test statistic . ( see image )
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Question 13   4 / 4 points Two different analytical tests can be used to determine the impurity level in steel alloys . Eight specimens are tested using both procedures , and the results are shown in the following tabulation . Use alpha=0.01 . Is there sufficient evidence to conclude that tests differ ? ( see image )
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Question 14   4 / 4 points Two different analytical tests can be used to determine the impurity level in steel alloys . Eight specimens are tested using both procedures , and the results are shown in the following tabulation . If the mean from Test 1 is 0.1 less than the mean from Test 2 , it is important to detect this with probability at least 0.90 . Was the use of eight alloys an adequate sample size ? If not , how many alloys should have been used ? ( see image )
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Question 15   4 / 4 points Consider the following film speed data : n1 = 8 , n 2 = 8 , s 1 = 0.11 , s 2 = 0.09 . Test H0 : variance 1 = variance 2 versus H1 : variance1 ≠ variance 2 using alpha = 0.02 . Determine the test statistic .
A ) 6.99
B ) .93
C ) 1.22
D ) 1.49
Question 16   4 / 4 points Consider the following film speed data : n1 = 8 , n 2 = 8 , s 1 = 0.11 , s 2 = 0.09 . Test H0 : variance 1 = variance 2 versus H1 : variance1 ≠ variance 2 using alpha = 0.02 . Determine the critical value .
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Question 17   4 / 4 points The F distribution is used to conduct hypothesis tests and construct confidence intervals about the standard deviation of two independent normal populations .
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Question 18   4 / 4 points Data from an experiment considered the variability in repeated measurements of the weight of a sheet of paper . The sample standard deviation from 15 measurements was 0.0083 grams . The 95 % confidence interval is [ .00607 , .013 ] . Does the measurement standard deviation differ from 0.01 grams at alpha = . 05 ?
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Question 12 4 / 4 points Two different analytical tests can be used to determine the impurity level in steel alloys. Eight specimens are tested using both procedures, and the results are shown in the following tabulation. Use alpha=0.01. Determine the test statistic. (see image) A) .1538 B) -3.48 C) 3.499
D) 1.960 Question 13 4 / 4 points Two different analytical tests can be used to determine the impurity level in steel alloys. Eight specimens are tested using both procedures, and the results are shown in the following tabulation. Use alpha=0.01. Is there sufficient evidence to conclude that tests differ? (see image)
Question 14 4 / 4 points Two different analytical tests can be used to determine the impurity level in steel alloys. Eight specimens are tested using both procedures, and the results are shown in the following tabulation. If the mean from Test 1 is 0.1 less than the mean from Test 2, it is important to detect this with probability at least 0.90. Was the use of eight alloys an adequate sample size? If not, how many alloys should have been used? (see image) 8
Question 15 4 / 4 points Consider the following film speed data: n1 = 8, n2 = 8, s1 = 0.11, s2 = 0.09. Test H0:variance 1= variance2 versus H1: variance1≠ variance2 using alpha = 0.02. Determine the test statistic.
Question 16 4 / 4 points Consider the following film speed data: n1 = 8, n2 = 8, s1 = 0.11, s2 = 0.09. Test H0:variance 1= variance2 versus H1: variance1≠ variance2 using alpha = 0.02. Determine the critical value. A) 6.99 B) 1.49 C) 1.22 D) .93
Question 17 4 / 4 points The F distribution is used to conduct hypothesis tests and construct confidence intervals about the standard deviation of two independent normal populations.
Question 18 4 / 4 points Data from an experiment considered the variability in repeated measurements of the weight of a sheet of paper. The sample standard deviation from 15 measurements was 0.0083 grams. The 95% confidence interval is [.00607, .013]. Does the measurement standard deviation differ from 0.01 grams at alpha = . 05?

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