Answer+14. For each of the following three sample sizes, construct the 95% confidence interval for thepopulation proportion. Use a sample proportion of 0.40 throughout. What happens to intervalwidth as sample size increases? Why?P = 0.40Sample A: N= 100Sample B: N1000Sample C: N= 10,0007.15. PS Two individuals are running for mayor of a large city. You conduct an election survey a weekbefore the election and find that 51% of the respondents prefer candidate A. Can you predict awinner? Use the 99% level. (HINT: In a two-candidate race, what percentage of the vote would thewinner need? Does the confidence interval indicate that candidate A has a sure margin of victory?72°F4094.14144Insert964G.

Introduction: The 100 (1 – α) % confidence interval for the population proportion, p is: Here, N is…

14. For each of the following three sample sizes, construct the 95% confidence interval for the population proportion. Use a sample proportion of 0.40 throughout. What happens to interval width as sample size increases? Why? P= 0.40 Sample A: N= 100 Sample B: N = 1000 Sample C: N= 10,000

14. For each of the following three sample sizes, construct the 95% confidence interval for the population proportion. Use a sample proportion of 0.40 throughout. What happens to interval width as sample size increases? Why? P= 0.40 Sample A: N= 100 Sample B: N = 1000 Sample C: N= 10,000

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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Concept explainers

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.

Question

Answer+
14. For each of the following three sample sizes, construct the 95% confidence interval for the
population proportion. Use a sample proportion of 0.40 throughout. What happens to interval
width as sample size increases? Why?
P = 0.40
Sample A: N= 100
Sample B: N
1000
Sample C: N= 10,000
7.15. PS Two individuals are running for mayor of a large city. You conduct an election survey a week
before the election and find that 51% of the respondents prefer candidate A. Can you predict a
winner? Use the 99% level. (HINT: In a two-candidate race, what percentage of the vote would the
winner need? Does the confidence interval indicate that candidate A has a sure margin of victory?
72°F
409
4.
141
44
Insert
96
4
G.

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