It's believed that as many as 24% of adults over 50 never graduated from high school. We wish to see if this percentage is the same among the 25 to 30 age group. What sample size would allow usto increase our confidence level to 95% while reducing the margin of error to only 2%?n= (Round up to the nearest integer.)

Givenpopulation proportion(p)=0.24Margin of error(E)=0.02confidence level=95%

Answered: It's believed that as many as 24% of…

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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We want to know how many people plan on buying a cell phone this year. Determine the sample size needed for a one proportion confidence interval to estimate this with a margin of error of 0.06 and a 90% confidence interval. We don't have any idea what the population proportion would be.
Your state is considering raising the legal age for consumption of alcohol beverages. How large a sample size much be taken to make an estimate of the true portion of citizens who favor this move? The error should be no moe than 0.01 with 99% confidence.
18. In the most recent census it was found 65% of those living in one state owned their own home. What sample size is needed to construct the 95% confidence interval to within 0.04 ? D. 944 C. 770 B. 547 A. 385
Suppose we know that a confidence interval for a population proportion is (0.105,0.355), with a sample proportion of p̂=0.23. What is the margin of error?
A 95% confidence interval for a population mean was reported to be 152.58 to 159.42. If ? = 15, what sample size was used in this study? (Round your answer to the nearest integer.)
Next question If a sample proportion is 0.68, which of the following could be a 90% confidence interval for the population proportion? ..... Select all that apply. A. Lower bound: 0.59; Upper bound: 0.77 B. Lower bound: 0.66; Upper bound: 0.70 OC. Lower bound: 0.50; Upper bound: 0.77 D. Lower bound: 0.77; Upper bound: 0.95 E. Lower bound: 0.67; Upper bound: 0.71 F3 F4 F5 F7 F8 24 4. %23 2 3. 6. Left control option command
If n=23, ē(x-bar)=34, and s=2, find the margin of error at a 98% confidence level Give your answer to two decimal places.
The president’s policy on domestic affairs received a 45% approval rating in a recent poll. The margin of error was given as 0.035. What sample size was used for this poll if we assume a 95% confidence level?
please answer part C correctly
If n=17, ē(x-bar)=44, and s=8, find the margin of error at a 95% confidence level Give your answer to two decimal places.
The General Social Survey asked 1,578 US residents: “Do you think the use of marijuana should be made legal, or not?” 61% of the respondents said it should be made legal. (a) The General Social Survey reported a sample where about 61% of US residents thought marijuana should be made legal. If we wanted to limit the margin of error of a 95% confidence interval to 2%, about how many Americans would we need to survey?

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