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a well known brokeage firm executive claimed that 90% of investors are currently confident of meeting their investment goals, an XYZ investor opitimism survey conducted over a two week period found that in a sample of 800 people, 82% of them said they are confident of meeting their goals  test the claim that the proportion of people who are confident is smaller that 90% at the 0.025 significance level.

a well known brokeage firm executive claimed that 90% of investors are currently confident of meeting their investment goals, an XYZ investor opitimism survey conducted over a two week period found that in a sample of 800 people, 82% of them said they are confident of meeting their goals  test the claim that the proportion of people who are confident is smaller that 90% at the 0.025 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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a well known brokeage firm executive claimed that 90% of investors are currently confident of meeting their investment goals, an XYZ investor opitimism survey conducted over a two week period found that in a sample of 800 people, 82% of them said they are confident of meeting their goals 

test the claim that the proportion of people who are confident is smaller that 90% at the 0.025 significance level.

 

the null and alternative hypothesis would be:

 

the test is:

A.) right tailed 

B.) left tailed

C.) two tailed

the test statistic is _____________

the p-value is ____________

based on this we 

A.) reject the null hypothesis

B.) fail to reject the null hypothesis 

 

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