A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 280 280 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 280 280 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  8% 12% Slightly Optimistic 31% 31% 36% Slightly Pessimistic 33% 24% Pessimistic  28% 28%   Step 6 of 10 :  Find the value of the test statistic. Round your answer to three decimal places.

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