Math 1431 - John Weber - Practice Test 3

Math 1431 – Spring 2003 – Test #3 – Practice
Question 3a Answer

Use the ZInterval function on your calculator.

The 90% CI is (2.8178, 2.9822)
The 95% CI is (2.8020, 2.9980)
The 90% CI is (2.7712, 3.0288)