HW Score: 33.76%, 3.38 of 10 a Claim < Question 1, 8.3.4 Part 1 of 2 7 points O Points: 0 of 1 Save Twelve different video games showing violence were observed. The duration times of violence were recorded, with the times (seconds) listed below. Assume that these sample data are used with a 0.10 significance level in a test of the claim that the population mean is greater than 80 sec. If we want to construct a confidence interval to be used for testing that claim, what confidence level should be used for a confidence interval? If the confidence interval is found to be 20.0 sec HW Score: 56.39%, 6. Two Means: mples < Question 8, 9.2.12-T Part 2 of 6 > points Points: 0.13 of 1 K Listed in the data table are IQ scores for a random sample of subjects with medium lead listed are statistics from a study done of IQ scores for a random sample of subjects with h IQ Scores Medium Lead Level High Lead Level 72 n2 = 11 95 92 X2 = 89.451 85 83 $2 = 10.200 97 83 92 101 111 91 e Print Done out - X el Jed work: 8-3 Testing a Claim a Mean A Question 3, 8.3.9 Part 2 of 4 HW Score: 33.76%, 3.38 of 10 points Points: 0.2 of 1 n list Display from Technology n 1 n 2 on 3 on 4 T-Test < 4.00 t = -0.280054 p = 0.390374 x = 3.77 Sx 5.509241 n = 45 Print Done ion 5 g Help me solve this Get more help - -Xrtphone carrie Mbps. Condu Iternative hypo Clear all Fina s: r Question 7, 9.2.11-T Part 2 of 6 > HW Score: 56.39%, 6.77 of 12 points Points: 0.13 of 1 Save Given in the table are the BMI statistics for random samples of men and women. Assume that the two samples are independent simple random samples selected from H normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.01 significance level for both parts. n Male BMI Female BMI H H2 44 44 S 27.3343 7.376263 25.6536 5.265507 What are the null and alternative hypotheses? OA. Ho H H: H1 H2 O C. Ho: "#2 H: H Question 6, 9.2.10-T Part 2 of 6 > HW Score: 56.39%, 6.77 of 12 points Points: 0.13 of 1 A study was done on body temperatures of men and women. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. What are the null and alternative hypotheses? A. Ho H1 H2 H: H > H H: H1 H2 The test statistic, t, is OB. Ho: H OD. Ho: H1 H2 H: H1 H2 (Round to two decimal places as needed.) elp Save Men Women H1 H2 n 11 59 X 97.73F 97.28F 1 S 0.87F 0.61F ans: r Question 5, 9.2.9-T Part 2 of 6 > HW Score: 56.39%, 6.77 of 12 points Points: 0.1 of 1 Researchers conducted a study to determine whether magnets are effective in treating back pain. The results are shown in the table for the treatment (with magnets) group and the sham (or placebo) group. The results are a measure of reduction in back pain. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. What are the null and alternative hypotheses? A. Ho: H =H2 H: H1 H2 OC. Ho: H = 2 H:41 #42 The test statistic, t, is OB. Ho: H1 H2 H: H a Claim tion or < Question 5, 8.4.10-T " Part 1 of 4 AM HW Score: 0%, 0 of 9 points O Points: 0 of 1 elp Save Suppose a mutual fund qualifies as having moderate risk if the standard deviation of its monthly rate of return is less than 3%. A mutual-fund rating agency randomly selects 27 months and determines the rate of return for a certain fund. The standard deviation of the rate of return is computed to be 2.24%. Is there sufficient evidence to conclude that the fund has moderate risk at the x = 0.01 level of significance? A normal probability plot indicates that the monthly rates of return are normally distributed. What are the correct hypotheses for this test? The null hypothesis is Ho: The alternative hypothesis is H: Claim Question 3, 8.3.9 Part 2 of 4 > HW Score: 33.76%, 3.38 of 10 points Points: 0.2 of 1 Save The display provided from technology available below results from using data for a smartphone carrier's data speeds at airports to test the claim that they are from a population having a mean less than 4.00 Mbps. Conduct the hypothesis test using these results. Use a 0.05 significance level. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. Click the icon to view the display from technology. MILIVU IVI A. Ho =4.00 Mbps H: <4.00 Mbps OC. Ho <4.00 Mbps H: = 4.00 Mbps Identify the test statistic. 4 (Round to two decimal places as needed.) B. H = 4.00 Mbps H: 4.00 Mbps ( ) D. Ho: "=4.00 Mbps H: > 4.00 Mbps 6: Question 4, 9.2.7-T > < Part 2 of 6 HW Score: 56.39%, 6.77 of 12 points Points: 0.13 of 1 A study was done on proctored and nonproctored tests. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. What are the null and alternative hypotheses? OA. Ho: H1 H2 H: H #H C. Ho: H #H H: H AM Claim tion or elp Question 4, 8.4.9-T Part 1 of 4 > HW Score: 0%, 0 of 9 points O Points: 0 of 1 Save The piston diameter of a certain hand pump is 0.7 inch. The manager determines that the diameters are normally distributed, with a mean of 0.7 inch and a standard deviation of 0.003 inch. After recalibrating the production machine, the manager randomly selects 26 pistons and determines that the standard deviation is 0.0026 inch. Is there significant evidence for the manager to conclude that the standard deviation has decreased at the a = 0.01 level of significance? What are the correct hypotheses for this test? The null hypothesis is Ho: The alternative hypothesis is H: Clear all Check answer Get more help - + H 5: < Question 8, 9.2.12-T Part 2 of 6 > HW Score: 56.39%, 6.77 of 12 points Points: 0.13 of 1 Save Listed in the data table are IQ scores for a random sample of subjects with medium lead levels in their blood. Also listed are statistics from a study done of IQ scores for a random sample of subjects with high lead levels. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Click the icon to view the data table of IQ scores. What are the null and alternative hypotheses? Assume that population 1 consists of subjects with medium lead levels and population 2 consists of subjects with high lead levels. OA. Ho: H1 H2 H > H2 OB. Ho: H1 H2 H: H1 H2 D. Ho: H1 H2 H H: H > H2 The test statistic is (Round to two decimal places as needed.) elp