A pilot study found that 72% of adult Americans would like an Internet connection in their car.(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 0.02 with 95% confidence. Use the correct rounding rule for sample size.(b) How would you modify this formula if a 99% confidence interval was desired? 1. Change the population proportion? 2. Replace 1.96 by 2.576 3 . Repalce 1.96 by 1.645(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 0.02 with 99% confidence. Use the correct rounding rule for sample size. Can you provide how to use this with technology (Calculator formula and/orr excel?) Thank you for your help!
A pilot study found that 72% of adult Americans would like an Internet connection in their car.
(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 0.02 with 95% confidence. Use the correct rounding rule for sample size.
(b) How would you modify this formula if a 99% confidence interval was desired?
1. Change the population proportion?
2. Replace 1.96 by 2.576
3 . Repalce 1.96 by 1.645
(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 0.02 with 99% confidence. Use the correct rounding rule for sample size.
Can you provide how to use this with technology (Calculator formula and/orr excel?) Thank you for your help!
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