22.14 is what needs answerd the other is just info for it use calculator method a ti83 or ti 84 STATE: Cocaine userseuro paper currency in Spain often shows traces of cocaine. Researchers collectedPLAN: 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. Estimateof cocaine.16 The researchers note that we can't tell whether the bills had been used20 euro bills in each of several Spanish cities. In Madrid, 17 out of 20 bore tracespaper currency bill. Spain has a high rate of cocaine use, so it's not surprising thatEXAMPLE 22.8 Cocaine Traces in Spanish CurrencyCocaine users commonly snort the powder up the nose through a rolled-upurrency bill. Spain has a high rate of cocaine use, so it's not surprising thatpapereuro perills in each of several Spanish cities. In Madrid, 17 out of 20 bore traces4stepThe researchers note that we can't tell whether the bills had been usedproportion 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 knowwe 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 theree only three failures. To apply the plus four method, add two successes and twoures to the original data. The plus four estimate of p is17 + 2 19= 0.7917%3D20 + 4 24tion is optional. or2014 Cocaine Traces in Spanish Currency, continued. The plus four methodis particularly useful when there are no successes or no failures in the data. Thestudy of Spanish currency described in Example 22.8 found that in Seville, all20 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 inSeville has cocaine traces, as this interval says.(b) Find the plus four estimate p and the plus four 95% confidence intervalfor p. These results are more reasonable in this situation.

Given: All the sample of 20 euro bills has cocaine traces. The data about study of Spanish currency…

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

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

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.

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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