A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 370 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 370 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 7% 11% Slightly Optimistic 28% 24% Slightly Pessimistic 27% 28% Pessimistic 38% 37% Step 3 of 10 : State the null and alternative hypothesis in terms of the expected proportions for each category.
