A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within 0.02 with 90% confidence if...

Extracted text: A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within 0.02 with 90% confidence if (a) she uses a previous estimate of 0.56? (b) she does not use any prior estimates? Click the icon to view the table of critical values. (a) n%3D (Round up to the nearest integer.) = (Round up to the nearest integer.) Table of critical values Level of Confidence, Area in Each Tail, 2 Critical Value, z: (1 – a) · 100% 90% 0.05 1.645 95% 0.025 1.96 99% 0.005 2.575 Print Done (1,1) More Submit te DII DD F12 O00 F10 F11 F9 吕0 F6 F7 F8 F5 F3 F4 esc F2 F1 %23 24 /6 2 3 5. 23