State whether each of the following changes would make a confidence interval wider or narrower. (Assume that
Question:
a. Changing from a 90% confidence level to a 99% confidence level.
b. Changing from a sample size of 30 to a sample size of 200.
c. Changing from a standard deviation of 20 pounds to a standard deviation of 25 pounds.
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a Wider because a greater level of con...View the full answer
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Related Book For 
Introductory Statistics Exploring The World Through Data
ISBN: 9780321978271
2nd Edition
Authors: Robert Gould, Colleen Ryan
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