A random sample of size n1=22​, taken from a normal population with a standard deviation σ1=6​, has a mean x1=80. A second random sample of size n2=37​,taken from a different normal population with a standard deviation σ2=4​, has a mean x2=33. Find a 92​% confidence interval for μ1−μ2

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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A random sample of size n1=22​, taken from a normal population with a standard deviation σ1=6​, has a mean x1=80. A second random sample of size n2=37​,taken from a different normal population with a standard deviation σ2=4​, has a mean x2=33. Find a 92​% confidence interval for μ1−μ2

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ISBN:
9780321964038
Author:
GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:
Pearson Addison Wesley,