A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 380380 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 380380 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%6% 7%7% Slightly Optimistic 30%30% 26%26% Slightly Pessimistic 21%21% 24%24% Pessimistic 43%43% 43%43% Copy Data Step 4 of 10 : Find the expected value for the number of respondents who are optimistic.
A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 380380 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 380380 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%6% 7%7% Slightly Optimistic 30%30% 26%26% Slightly Pessimistic 21%21% 24%24% Pessimistic 43%43% 43%43% Copy Data Step 4 of 10 : Find the expected value for the number of respondents who are optimistic.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 380380 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 380380 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%6% | 7%7% |
| Slightly Optimistic | 30%30% | 26%26% |
| Slightly Pessimistic | 21%21% | 24%24% |
| Pessimistic | 43%43% | 43%43% |
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