MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Transcribed Image Text:A research center survey of 2,374 adults found that 1,854 had bought something online. Of these online shoppers, 1,288 are weekly online shoppers. Complete parts (a) through (c) below.
a. Construct a 95% confidence interval estimate of the population proportion f adults who had bought something online.
0.7643 ≤ 0.7976 (Round to four decimal places as needed.)
b. Construct a 95% confidence interval estimate of the population proportion of online shoppers who are weekly online shoppers.
≤Ã≤ (Round to four decimal places as needed.)
G
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Step 1: Write down the given information
N = 2374
1854 had bought something else
n1 = 1854
1288 online weekly shoppers
n2 = 1288
We have to calculate 95% confidence interval for the population proportion of both ( who bought something else and online weekly shoppers )
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