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A bank officer claims that a new procedure has reduced the number of non-paid loans. To verify this claim, two random samples are taken from the loan records. The first sample consists of 1500 loans, taken from the records with old procedure, has shown that the number of non-paid loans is 75. Next, the second sample, consisting of 2000 loans with new procedure has revealed that 80 are non-paid loans. Determine a 90% confidence interval for the true difference in the proportion of non-paid loans between the old and new procedures.

A bank officer claims that a new procedure has reduced the number of non-paid loans. To verify this claim, two random samples are taken from the loan records. The first sample consists of 1500 loans, taken from the records with old procedure, has shown that the number of non-paid loans is 75. Next, the second sample, consisting of 2000 loans with new procedure has revealed that 80 are non-paid loans. Determine a 90% confidence interval for the true difference in the proportion of non-paid loans between the old and new procedures.

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
Problem 1P
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5. A bank officer claims that a new procedure has reduced the number of non-paid loans. To verify this claim, two random samples are taken from the loan records. The first sample consists of 1500 loans, taken from the records with old procedure, has shown that the number of non-paid loans is 75. Next, the second sample, consisting of 2000 loans with new procedure has revealed that 80 are non-paid loans. Determine a 90% confidence interval for the true difference in the proportion of non-paid loans between the old and new procedures.
Transcribed Image Text:5. A bank officer claims that a new procedure has reduced the number of non-paid loans. To verify this claim, two random samples are taken from the loan records. The first sample consists of 1500 loans, taken from the records with old procedure, has shown that the number of non-paid loans is 75. Next, the second sample, consisting of 2000 loans with new procedure has revealed that 80 are non-paid loans. Determine a 90% confidence interval for the true difference in the proportion of non-paid loans between the old and new procedures.
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