Question #15507
Suppose a 95 percent confidence interval for the average number of minutes a regular customer uses with a cell phone in a month is 100 plus or minus 35 minutes.

What are the lower and upper boundaries for this confidence interval?
1
Expert's answer
2012-09-27T10:42:44-0400
Lower is 100-35=65 and upper is 100+35=135

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