In order to estimate the percentage of adults who file their taxes at least two weeks before the April 15th deadline, a 90% confidence interval is constructed.  The interval ends up being from 0.786 to 0.854.  Which of the following could be a 95% confidence interval for the same sample data?  I.      0.796 to 0.864 II.     0.755 to 0.865 III.    0.779 to 0.861 IV.    0.789 to 0.851

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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In order to estimate the percentage of adults who file their taxes at least two weeks before the April 15th deadline, a 90% confidence interval is constructed.  The interval ends up being from 0.786 to 0.854.  Which of the following could be a 95% confidence interval for the same sample data? 

I.      0.796 to 0.864

II.     0.755 to 0.865

III.    0.779 to 0.861

IV.    0.789 to 0.851

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