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Assuming that both populations are normallydistributed, construct a 90% confidence interval about 12. ( 1 represents the mean of the experimental group and 2 represents

Assuming that both populations are normallydistributed, construct a 90% confidence interval about 12. (1 represents the mean of the experimental group and 2 represents the mean of the control group.)

Experimental Control

n: 26 n: 18

x: 45.1 x: 40.4

s: 6.7 s: 13.2

What is the lower and upper bound?

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