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Independent random samples were selected from two quantitative populations, with sample sizes, means, and standard deviations...

Independent random samples were selected from two quantitative populations, with sample sizes, means, and standard deviations given below. n1 = n2 = 80, x1 = 125.3, x2 = 123.6, s1 = 5.7, s2 = 6.7

Construct a 95% confidence interval for the difference in the population means (μ1 − μ2). (Round your answers to two decimal places.)

Find a point estimate for the difference in the population means.

Calculate the margin of error. (Round your answer to two decimal places.)

Math   Statistics-And-Probability   
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Answer #1

The statistical software output for this problem is:

Hence,

95% confidence interval will be:

(-0.24, 3.64)

Point estimate = Sample diff = 1.7

Margin of error = (3.64 + 0.24)/2 = 1.94

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