Two random samples are selected from two independent populations. A summary of the samples sizes, sample...

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Two random samples are selected from two independent populations. A summary of the samples sizes, sample...

Two random samples are selected from two independent populations. A summary of the samples sizes, sample means, and sample standard deviations is given below:

n1=51,

n2=46,

x¯1=57.8,

x¯2=75.3,

s1=5.2

s2=11

Find a 94.5% confidence interval for the difference μ1−μ2μ1−μ2 of the means, assuming equal population variances.

Confidence Interval =

math Statistics-And-Probability

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Answer 1

Answer #1

pooled variance: (50)(5.2) +(45 () 51+46-2 71.5474 Level of significance,α-0055. degrees of freedom.ni +m-2-95 two tailed cri

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Answer 2

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