8. A poll taken from a sample of 600 voters found that 58% say the United States spends too little money on funding cancer research. a. Find the 90% confidence interval for the true proportion of voters who believe the United States spends too little on funding cancer research. b. State the margin of error for the confidence interval you found in part a. c. Suppose it is determined that 56% of all voters actually believe the U.S. spends too little on funding cancer research. Was the confidence interval you found in part a. an accurate estimate of the true proportion? Explain.
8. A poll taken from a sample of 600 voters found that 58% say the United States spends too little money on funding cancer research. a. Find the 90% confidence interval for the true proportion of voters who believe the United States spends too little on funding cancer research. b. State the margin of error for the confidence interval you found in part a. c. Suppose it is determined that 56% of all voters actually believe the U.S. spends too little on funding cancer research. Was the confidence interval you found in part a. an accurate estimate of the true proportion? Explain.
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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Question
Transcribed Image Text:**Problem 8: Confidence Intervals and Margin of Error Analysis**
A poll taken from a sample of 600 voters found that 58% say the United States spends too little money on funding cancer research.
a. **Find the 90% confidence interval** for the true proportion of voters who believe the United States spends too little on funding cancer research.
b. **State the margin of error** for the confidence interval you found in part a.
c. Suppose it is determined that 56% of all voters actually believe the U.S. spends too little on funding cancer research. **Was the confidence interval you found in part a an accurate estimate of the true proportion?** Explain.
Expert Solution
Step 1: Understanding the problem
Given that
Sample size (n)=600
Sample proportion
We have to find
a.
90% confidence interval for the true proportion of voters who believe the United States spends too little on funding cancer research.
b.
Margin of error
c .Suppose it is determined that 56% of all voters actually believe the U.S. spends too little on funding cancer research.
Was the confidence interval you found in part a. an accurate estimate of the true proportion
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