Independent random samples were selected from two quantitative populations, with sample sizes, means, and standard deviations given below. n1 = n2 = 70, x?1 = 125.3, x?2 = 123.8, s1 = 5.9, s2 = 6.3 Construct a 95% confidence interval for the difference in the population means (?1 ? ?2). (Round your answers to two decimal places.) to Find a point estimate for the difference in the population means. Calculate the margin of error. (Round your answer to two decimal places.)
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The point estimate for the difference in the population means is simply the difference between the sample means: X1 - X2 = 125.3 - 123.8 = 1.5 So, the point estimate for the difference in the population means is 1.5. Show moreā¦
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Independent random samples were selected from two quantitative populations, with sample sizes, means, and variances given below. Population 1 2 Sample Size 39 43 Sample Mean 9.3 7.3 Sample Variance 8.61 14.52 Construct a 90% confidence interval for the difference in the population means. (Use Ī¼1 ā Ī¼2. Round your answers to two decimal places.) Construct a 99% confidence interval for the difference in the population means. (Round your answers to two decimal places.)
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