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Name: A psychologist conducted a survey of the attitude towards the sustaina
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Description: A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 250 250 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test t

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 psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 250 250 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 250 250 individuals and asks them the same questions. Can the psychologist confirm his theory that the attitudes have changed from the first survey to the second survey?

Attitude	1st Survey	2nd Survey
Optimistic	6%	10%
Slightly Optimistic	13%	7%
Slightly Pessimistic	20%	23%
Pessimistic	61%	60%

Step 3 of 10 :

State the null and alternative hypothesis in terms of the expected proportions for each category.

Step 1 of 10 :

State the null and alternative hypothesis.

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