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00 14 Cocaine Traces in Spanish Currency, continued. The plus four method is particularly useful when there are no successes or no failures in the data. The study of Spanish currency described in Example 22.8 found that in Seville, all 20 of a sample of 20 euro bills had cocaine traces. (a) What is the sample proportion p of contaminated bills? What is the large- sample 95% confidence interval for p? It's not plausible that every Seville has cocaine traces, as this interval says. bill in (b) Find the plus four estimate p and the plus four 95% confidence interval for p. These results are more reasonable in this situation.

00 14 Cocaine Traces in Spanish Currency, continued. The plus four method is particularly useful when there are no successes or no failures in the data. The study of Spanish currency described in Example 22.8 found that in Seville, all 20 of a sample of 20 euro bills had cocaine traces. (a) What is the sample proportion p of contaminated bills? What is the large- sample 95% confidence interval for p? It's not plausible that every Seville has cocaine traces, as this interval says. bill in (b) Find the plus four estimate p and the plus four 95% confidence interval for p. These results are more reasonable in this situation.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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22.14 is what needs answerd the other is just info for it use calculator method a ti83 or ti 84

STATE: Cocaine users euro paper currency in Spain often shows traces of cocaine. Researchers collected PLAN: Take p to be the proportion of bills that show cocaine traces. That is, a "success" is a bill that shows cocaine traces. Give a 95% confidence interval for p. the proportion of all euro bills in Madrid that have traces of cocaine. to snort cocaine or had been contaminated in currency-sorting machines. Estimate of cocaine.16 The researchers note that we can't tell whether the bills had been used 20 euro bills in each of several Spanish cities. In Madrid, 17 out of 20 bore traces paper currency bill. Spain has a high rate of cocaine use, so it's not surprising that EXAMPLE 22.8 Cocaine Traces in Spanish Currency Cocaine users commonly snort the powder up the nose through a rolled-up urrency bill. Spain has a high rate of cocaine use, so it's not surprising that paper euro perills in each of several Spanish cities. In Madrid, 17 out of 20 bore traces 4step The researchers note that we can't tell whether the bills had been used proportion of all euro bilis in Madrid that have traces of cocaine. SOLVE: It is not clear how the bills in the sample were selected, so we don't know we have an SRS. We will act as though we have an SRS, but we proceed with cau- on The conditions for use of the large-sample interval are not met because there e only three failures. To apply the plus four method, add two successes and two ures to the original data. The plus four estimate of p is 17 + 2 19 = 0.7917 %3D 20 + 4 24 tion is optional.
Transcribed Image Text:STATE: Cocaine users euro paper currency in Spain often shows traces of cocaine. Researchers collected PLAN: Take p to be the proportion of bills that show cocaine traces. That is, a "success" is a bill that shows cocaine traces. Give a 95% confidence interval for p. the proportion of all euro bills in Madrid that have traces of cocaine. to snort cocaine or had been contaminated in currency-sorting machines. Estimate of cocaine.16 The researchers note that we can't tell whether the bills had been used 20 euro bills in each of several Spanish cities. In Madrid, 17 out of 20 bore traces paper currency bill. Spain has a high rate of cocaine use, so it's not surprising that EXAMPLE 22.8 Cocaine Traces in Spanish Currency Cocaine users commonly snort the powder up the nose through a rolled-up urrency bill. Spain has a high rate of cocaine use, so it's not surprising that paper euro perills in each of several Spanish cities. In Madrid, 17 out of 20 bore traces 4step The researchers note that we can't tell whether the bills had been used proportion of all euro bilis in Madrid that have traces of cocaine. SOLVE: It is not clear how the bills in the sample were selected, so we don't know we have an SRS. We will act as though we have an SRS, but we proceed with cau- on The conditions for use of the large-sample interval are not met because there e only three failures. To apply the plus four method, add two successes and two ures to the original data. The plus four estimate of p is 17 + 2 19 = 0.7917 %3D 20 + 4 24 tion is optional.
or 2014 Cocaine Traces in Spanish Currency, continued. The plus four method is particularly useful when there are no successes or no failures in the data. The study of Spanish currency described in Example 22.8 found that in Seville, all 20 of a sample of 20 euro bills had cocaine traces. (a) What is the sample proportion p of contaminated bills? What is the large- sample 95% confidence interval for p? It's not plausible that every bill in Seville has cocaine traces, as this interval says. (b) Find the plus four estimate p and the plus four 95% confidence interval for p. These results are more reasonable in this situation.
Transcribed Image Text:or 2014 Cocaine Traces in Spanish Currency, continued. The plus four method is particularly useful when there are no successes or no failures in the data. The study of Spanish currency described in Example 22.8 found that in Seville, all 20 of a sample of 20 euro bills had cocaine traces. (a) What is the sample proportion p of contaminated bills? What is the large- sample 95% confidence interval for p? It's not plausible that every bill in Seville has cocaine traces, as this interval says. (b) Find the plus four estimate p and the plus four 95% confidence interval for p. These results are more reasonable in this situation.
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