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In a recent year,  27% of all cars purchased were black in color.  A manufacturer thinks that percentage has decreased.  A random sample of 300 new car purchases had 70 black cars.  Test the researcher's claim at the αα=0.1 significance level.

In a recent year,  27% of all cars purchased were black in color.  A manufacturer thinks that percentage has decreased.  A random sample of 300 new car purchases had 70 black cars.  Test the researcher's claim at the αα=0.1 significance level.

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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In a recent year,  27% of all cars purchased were black in color.  A manufacturer thinks that percentage has decreased.  A random sample of 300 new car purchases had 70 black cars.  Test the researcher's claim at the αα=0.1 significance level.

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