MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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A survey of 2305 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 408 have donated blood in the past two years. Complete parts (a) through (c) below. (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated blood in the past two years. A p = 0.177 (Round to three decimal places as needed.) (b) Verify that the requirements for constructing a confidence interval about p are satisfied. The sample can be assumed to be a simple random sample, the value of np (1-P) is 335.772, which is greater than or equal to 10, and the sample size can be assumed to be less than or equal to 5% of the population size. (Round to three decimal places as needed.) (c) Construct and interpret a 90% confidence interval for the population proportion of adults in the country who have donated blood in the past two years. Select the correct choice below and fill in any answer boxes within your choice. (Type integers or decimals rounded to three decimal places as needed. Use ascending order.) A. We are 90% confident the proportion of adults in the country aged 18 and older who have donated blood in the past two years is between 0.169 and 0.185 O B. There is a 90% chance the proportion of adults in the country aged 18 and older who have donated blood in the past two years is between 0.169 and 0.185 Clear all Final check
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Transcribed Image Text:A survey of 2305 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 408 have donated blood in the past two years. Complete parts (a) through (c) below. (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated blood in the past two years. A p = 0.177 (Round to three decimal places as needed.) (b) Verify that the requirements for constructing a confidence interval about p are satisfied. The sample can be assumed to be a simple random sample, the value of np (1-P) is 335.772, which is greater than or equal to 10, and the sample size can be assumed to be less than or equal to 5% of the population size. (Round to three decimal places as needed.) (c) Construct and interpret a 90% confidence interval for the population proportion of adults in the country who have donated blood in the past two years. Select the correct choice below and fill in any answer boxes within your choice. (Type integers or decimals rounded to three decimal places as needed. Use ascending order.) A. We are 90% confident the proportion of adults in the country aged 18 and older who have donated blood in the past two years is between 0.169 and 0.185 O B. There is a 90% chance the proportion of adults in the country aged 18 and older who have donated blood in the past two years is between 0.169 and 0.185 Clear all Final check
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