The International Nanny Association (INA) reports that in a sample of 928 in- home child care providers (nannies), 128 have passed the INA Nanny Credential Exam (2014 International Nanny Association Salary and Benefits Survey). Use Wilson's adjustment to find a 95% confidence interval for the true proportion of all nannies who have passed the INA certification exam. b. We want to decide whether the proportion of who passed the INA certification exam exceeds than .12 a.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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A &B 

The International Nanny Association (INA) reports that in a sample of 928 in- home child care
providers (nannies), 128 have passed the INA Nanny Credential Exam (2014 International
Nanny Association Salary and Benefits Survey).
Use Wilson's adjustment to find a 95% confidence interval for the true proportion of all
nannies who have passed the INA certification exam.
b. We want to decide whether the proportion of who passed the INA certification exam
exceeds than .12
a.
Transcribed Image Text:The International Nanny Association (INA) reports that in a sample of 928 in- home child care providers (nannies), 128 have passed the INA Nanny Credential Exam (2014 International Nanny Association Salary and Benefits Survey). Use Wilson's adjustment to find a 95% confidence interval for the true proportion of all nannies who have passed the INA certification exam. b. We want to decide whether the proportion of who passed the INA certification exam exceeds than .12 a.
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