Question An engineer in charge of a production process that produces a stain for outdoor decks has designed a study to test the research hypotheses that an additive to the stain will produce an increase in the ability of the stain to resist water absorption. The mean absorption rate of the stain without the additive […]
Question Question:Chapter 6, Section 4-CI, Exercise 190Use the t-distribution to find a confidence interval for a difference in means μ1-μ2 given the relevant sample results. Give the best estimate for μ1-μ2, the margin of error, and the confidence interval. Assume the results come from random samples from populations that are approximately normally distributed. A 95% confidence interval for μ1-μ2 using the sample results x¯1=526, s1=128, n1=400 and x¯2=423, s2=91, n2=200 […]
Question Question:Chapter 6, Section 4-D, Exercise 180Use the formula to find the standard error of the distribution of differences in sample means, x¯1-x¯2. Samples of size 120 from Population 1 with mean 90 and standard deviation 14 and samples of size 90 from Population 2 with mean 79 and standard deviation 15 Round your answer for the standard error to two decimal places. standard error = Enter your answer in accordance to the […]
Question Are you more likely to be satisfied with your automobile purchase when it is new or used? The Following data represents the level of satisfaction of the buyer for both new and used cars. Not too satisfied new: 11 used: 25 total: 36 Pretty satisfied 78 79 157 Extremely satisfied 118 85 203 Total 207 189 396 Looking for a Similar Assignment? Order now and […]
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