In spite of the potential safety hazards, some people would like to have an Internet connection in their car. A preliminary survey of adult Americans has estimated this proportion to be somewhere around 0.40. (a) Use the given preliminary estimate to determine the sample size required to estimate the proportion of adult Americans who would like an Internet connection in their car to within 0.05 with 95% confidence. (Enter your answer as a whole number.) 369 (b) The formula for determining sample size given in this section corresponds to a confidence level of 95%. How would you modify this formula if a 99% confidence level was desired? 1 - p)(1.96)² On p(1-) On p(1-p) 2.58 12 On = p(1 - p)(233) On = p(1 - p)(1.645) P)(205) On p(1-pl 4 637 x (c) Use the given preliminary estimate to determine the sample size required to estimate the proportion of adult Americans who would like an Internet connection in their car to within 0.05 with 99% confidence. (Enter your answer as a whole number.)
In spite of the potential safety hazards, some people would like to have an Internet connection in their car. A preliminary survey of adult Americans has estimated this proportion to be somewhere around 0.40. (a) Use the given preliminary estimate to determine the sample size required to estimate the proportion of adult Americans who would like an Internet connection in their car to within 0.05 with 95% confidence. (Enter your answer as a whole number.) 369 (b) The formula for determining sample size given in this section corresponds to a confidence level of 95%. How would you modify this formula if a 99% confidence level was desired? 1 - p)(1.96)² On p(1-) On p(1-p) 2.58 12 On = p(1 - p)(233) On = p(1 - p)(1.645) P)(205) On p(1-pl 4 637 x (c) Use the given preliminary estimate to determine the sample size required to estimate the proportion of adult Americans who would like an Internet connection in their car to within 0.05 with 99% confidence. (Enter your answer as a whole number.)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Can you help with part c? I'm not sure why I'm wrong.
Transcribed Image Text:13
In spite of the potential safety hazards, some people would like to have an Internet connection in their car. A preliminary survey of adult Americans has estimated this proportion to be somewhere around 0.40.
(a) Use the given preliminary estimate to determine the sample size required to estimate the proportion of adult Americans who would like an Internet connection in their car to within 0.05 with 95% confidence. (Enter your answer as a whole number.)
369
(b) The formula for determining sample size given in this section corresponds to a confidence level of 95%. How would you modify this formula if a 99% confidence level was desired?
On = p(1 - p) (1.96)
B
2
n = p(1 - p)(2.58) 2
- p) (2.33) 2
On = p(1 - p)
B
P)(1.645)²
On = p(1 - p)
On = p(1 - p) (2.05) 2
637
(c) Use the given preliminary estimate to determine the sample size required to estimate the proportion of adult Americans who would like an Internet connection in their car to within 0.05 with 99% confidence. (Enter your answer as a whole number.)
X
+
3
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