For a sample of 35 items from a population for which the standard deviation is σ = 20.5, the sample mean is 458.0. At the 0.05 level of significance, test H0: μ = 450 versus H1: μ ≠ 450. Determine and interpret the p-value for the test.
Answer to relevant QuestionsFor a sample of 12 items from a normally distributed population for which the standard deviation is σ = 17.0, the sample mean is 230.8. At the 0.05 level of significance, test H0: μ ≤ 220 versus H1: μ > 220. Determine ...A manufacturer of electronic kits has found that the mean time required for novices to assemble its new circuit tester is 3 hours, with a standard deviation of 0.20 hours. A consultant has developed a new instructional ...For a simple random sample of 40 items, x-bar = 25.9 and s = 4.2. At the 0.01 level of significance, test H0: μ = 24.0 versus H1: μ ≠ 24.0. During 2008, college work-study students earned a mean of $1478. Assume that a sample consisting of 45 of the work-study students at a large university was found to have earned a mean of $1503 during that year, with a ...According to the Insurance Information Institute, the mean annual expenditure for automobile insurance for U.S. motorists is $817. Suppose that a government official in North Carolina has surveyed a simple random sample of ...
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