Question
a) David wants to sample his market for a pizza shop. A market study conducted last year indicated that 45% might visit his pizzeria. How
a) David wants to sample his market for a pizza shop. A market study conducted last year indicated that 45% might visit his pizzeria. How big a sample does he need to have a margin of error of plus/minus 5%, 19 out of 20 times?
b) Assume that David in Q1 has decided to change his margin of error to plus/minus 2%, how big a sample size does he need? Has it changed from Q1?
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Business Analytics Data Analysis and Decision Making
Authors: S. Christian Albright, Wayne L. Winston
5th edition
1133629601, 9781285965529 , 978-1133629603
