a survey of the attitude towards the sustainability of American energy consumpti

Question

a survey of the attitude towards the sustainability of American energy consumption with 380 randomly selected believes that these attitudes have changed over time. To test this he randomly selects 380 individuals and asks them the same questions psychologist confirm his theory that the attitudes have changed from the first survey to the second survey? 1st Survey 21% 22 % 13% 44 % Attitude 2nd Survey 15% 29 14% 42% Slightly Optimistic | slightly Pessmestic | Step 4 of 10: Find the expected value for the number of respondents who are optimistic. Round your answer to two decimal places

Explanation / Answer

Step 4 of 10

here expeccted value for the number of respondents who are optimistic in first survey = 380 * 0.21 = 79.8

expected value for the number of respondents who are optimistic in first survey = 380 * 0.15 = 57

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