In a simple random sample of 1200 Americans age 20 and over, the proportion with diabetes was
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In a simple random sample of 1200 Americans age 20 and over, the proportion with diabetes was found to be 0.115 (or 11.5%).
a. What is the standard error for the estimate of the proportion of all Americans age 20 and over with diabetes?
b. Find the margin of error, using a 95% confidence level, for estimating this proportion.
c. Report the 95% confidence interval for the proportion of all Americans age 20 and over with diabetes.
d. According to the Centers for Disease Control and Prevention, nationally, 10.7% of all Americans age 20 or over have diabetes. Does the confidence interval you found in part c support or refute this claim? Explain.
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a Large Sample np 1200 0115 138 10 and n 1 p 1200 08...View the full answer
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Related Book For 
Introductory Statistics Exploring The World Through Data
ISBN: 9780321978271
2nd Edition
Authors: Robert Gould, Colleen Ryan
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