A confidence interval for a population mean is given as (4.8, 7.2). What is the sample...
A confidence interval for a population mean is given as (4.8, 7.2). What is the sample mean and the margin of error Group of answer choices.
Homework Answers
Solution :
=
(Lower confidence interval + Upper confidence interval ) / 2
Sample mean =
= (4.8+7.2) / 2=6
Margin of error = E = Upper confidence interval -
= 7.2-6=1.2
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