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You may need to use the appropriate appendix table or technology to answer this question. Consider the following results for two samples randomly taken
You may need to use the appropriate appendix table or technology to answer this question. Consider the following results for two samples randomly taken from two populations. Sample A Sample B Sample Size 26 28 Sample Mean 26 24 Sample Standard Deviation 8 7 (a) Determine the degrees of freedom for the t-distribution. (Round your answer down to the nearest integer.) 2 (b) Develop a 95% confidence interval for the difference between the two population means. (Use Sample A - Sample B. Round your answer to three decimal places.) to (c) Is there conclusive evidence that one population has a larger mean? Explain. Because the range of the interval is from positive to positive, it indicates that there is no conclusive evidence (at 95% confidence) that Sample A has a larger mean than Sample B. Because the range of the interval is from negative to positive, it indicates that there is conclusive evidence (at 95% confidence) that Sample A has a larger mean than Sample B. O Because the range of the interval is from positive to positive, it indicates that there is conclusive evidence (at 95% confidence) that Sample A has a larger mean than Sample B. Because the range of the interval is from negative to positive, it indicates that there is no conclusive evidence (at 95% confidence) that Sample A has a larger mean than Sample B.
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