Question

1:When performing a two-tailed test for the difference between means, with Ho:-=0, the hypothesized difference between the two population means is zero. Select one: True False

Question 2: If the null hypothesis is - 10 and the alternative hypothesis is - > 10, the appropriate test to use is a lower tail test. Select one: True False

Question 3:Suppose it desired to compare two physical education training programs for preadolescent girls. A total of 82 girls are randomely selected, with 41 assigned to each program. After three 6-week period on the program, each girl is given a fitness test that yields a score between o to 100. The mean and variances of the scores for the two groups are shown in the table. n s2 Program 1 41 78.7 201.64 Program 2 41 75.3 259.21 The 90% confidence interval for the difference of two population mean ( - ) is?

Select one: A. -3.4 + 4.500 B. -3.4 +1.9600 C. 3.4 + 5.5152 D. 3.4 + 5.5822

Question 4 :Suppose it desired to compare two physical education training programs for preadolescent girls. A total of 82 girls are randomely selected, with 41 assigned to each program. After three 6-week period on the program, each girl is given a fitness test that yields a score between o to 100. The mean and variances of the scores for the two groups are shown in the table. n s2 Program 1 41 78.7 201.64 Program 2 41 75.3 259.21 Management would like to see if there is a significant difference in average fitness test score between these two programs. The appropriate null and alternative hypotheses are:

Select one: A. H0: - = 0 and Ha: - 0 B. H0:1 - 2 = 0 and Ha: 1 - 2 0 C. H0: - 0 and Ha: - 0 D. H0: - 0 and Ha: - = 0

Question 5 :Suppose it desired to compare two physical education training programs for preadolescent girls. A total of 82 girls are randomely selected, with 41 assigned to each program. After three 6-week period on the program, each girl is given a fitness test that yields a score between o to 100. The mean and variances of the scores for the two groups are shown in the table. n s2 Program 1 41 78.7 201.64 Program 2 41 75.3 259.21 Management would like to see if there is a significant difference in average fitness test score between these two programs. The test statistic for this problem is: Select one: A. z=1.0141 B. t=1.0141 C. z=0.3025 D. t=0.3025

Question 6 :Suppose it desired to compare two physical education training programs for preadolescent girls. A total of 82 girls are randomely selected, with 41 assigned to each program. After three 6-week period on the program, each girl is given a fitness test that yields a score between o to 100. The mean and variances of the scores for the two groups are shown in the table. n s2 Program 1 41 78.7 201.64 Program 2 41 75.3 259.21 At =10%, can management conclude that there is no significant difference in average fitness test score between these two programs? Select one: A. Yes. Since test statistic is less than the critical test value, we failed to reject the null hypothesis. Therefore, there is no significant difference in average fitness test score. B. No. Since test statistic is less than the critical test value, we failed to reject the null hypothesis. Therefore, there is a significant difference in average fitness test score. C. Yes. Since test statistic is greater than the critical test value, we rejected the null hypothesis. Therefore, there is no significant difference in average fitness test score. D. No. Since test statistic is greater than the critical test value, we rejected the null hypothesis. Therefore, there is a significant difference in average fitness test score.

Question 7 :Moving companies are required by the government to publish a carrier Performance Report each year. One of the descriptive statistics they must include is the annual percentage of shipments on which a $50 or greater claim for loss or damage was filed. Suppose Company A and Company B each decided to determine this figure by sampling their records, and they report the data shown in the table: Company A Company B Total Shipment Sampled 900 750 Number of shipment with a claim $50 162 60 Give the point estimate for estimating the true difference in the proportion of shipments that result in claims being made against Company A and Company B. Select one: A. 0.10 B. 6.18 C. 0.18 D. 1.645

Question 8 : Moving companies are required by the government to publish a carrier Performance Report each year. One of the descriptive statistics they must include is the annual percentage of shipments on which a $50 or greater claim for loss or damage was filed. Suppose Company A and Company B each decided to determine this figure by sampling their records, and they report the data shown in the table: Company A Company B Total Shipment Sampled 900 750 Number of shipment with a claim $50 162 60 Give the 95% Confidence interval for estimating the true difference in the proportion of shipments that result in claims being made against Company A and Company B. Select one: A. 0.18 + 0.0266 B. 0.10 + 0.0317 C. 0.10 + 0.0266 D. 0.08 + 0.0317

Question 9 :Moving companies are required by the government to publish a carrier Performance Report each year. One of the descriptive statistics they must include is the annual percentage of shipments on which a $50 or greater claim for loss or damage was filed. Suppose Company A and Company B each decided to determine this figure by sampling their records, and they report the data shown in the table: Company A Company B Total Shipment Sampled 900 750 Number of shipment with a claim $50 162 60 Set the null and alternative hypotheses to determine if Company A has a higher proportion of shipments in which a $50 or greater claim for loss or damage is filed than does the Company B Select one: A. H0:PB - PA 0 and Ha:PB - PA > 0 B. H0:PA - PB 0 and Ha:PB - PA > 0 C. H0:PA - PB = 0 and Ha:PA - PB 0 D. H0:PA - PB 0 and Ha:PA - PB > 0

Question 10 :Moving companies are required by the government to publish a carrier Performance Report each year. One of the descriptive statistics they must include is the annual percentage of shipments on which a $50 or greater claim for loss or damage was filed. Suppose Company A and Company B each decided to determine this figure by sampling their records, and they report the data shown in the table: Company A Company B Total Shipment Sampled 900 750 Number of shipment with a claim $50 162 60 Government agency would like to determine if Company A has a higher proportion of shipments in which a $50 or greater claim for loss or damage is filed than does the Company B. What is the value for the Pooled Estimator of population proportion? Select one: A. 0.18 B. 0.08 C. 0.1345 D. 0.26

Question 11 :Moving companies are required by the government to publish a carrier Performance Report each year. One of the descriptive statistics they must include is the annual percentage of shipments on which a $50 or greater claim for loss or damage was filed. Suppose Company A and Company B each decided to determine this figure by sampling their records, and they report the data shown in the table: Company A Company B Total Shipment Sampled 900 750 Number of shipment with a claim $50 162 60 At = 5%, can the government agency conclude that Company A has a higher proportion of shipments in which a $50 or greater claim for loss or damage is filed than does the Company B? Select one: A. Since test statistics z=5.927 > critical value z=1.645, we reject the null hypothesis. There is sufficient evidence to indicate that Company A has a higher portion of shipments in which a $50 or greater claim for loss or damage is filed than does the Company B. B. Since test statistics z=1.645 < critical value z=5.927, we failed to reject the null hypothesis. There is sufficient evidence to indicate that Company A does not have a higher portion of shipments in which a $50 or greater claim for loss or damage is filed than does the Company B. C. Since test statistics z=5.927 > critical value z=1.96, we reject the null hypothesis. There is sufficient evidence to indicate that Company A has a higher portion of shipments in which a $50 or greater claim for loss or damage is filed than does the Company B. D. Since test statistics t=5.927 > critical value t=2.326, we reject the null hypothesis. There is sufficient evidence to indicate that Company A has a higher portion of shipments in which a $50 or greater claim for loss or damage is filed than does the Company B.

Answer 1

rue because if you are sayinh that the difference is zero so that meansthat are equals 2) false the appropriate test to use isa upper tail test because the alternaive is > 3) alpha -0.10 alpha / 2= 0.05 Z = 1.64 201.64+259.21 41 1:78.7-75.3±1.64 * 3.4+5.5152 4) 78.7-75.3 201.64+259.21 Z 1.0141 6) alpha -0.10 alphal 2 0.05 critical value: 1.64 concluSTOM Yes. Since test stati stic is less than the critical test value, we failed to reject the null hypothesis. Therefore, there is no significant difference in average fitness test score

for the other question

you should post it in a new question please