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 2 of 10 : What does the null hypothesis indicate about the proportions of respondents with each attitude?
The null hypothesis in this scenario will be:
The proportion of respondents with each attitude has not changed from first to second survey.
A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with...
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...
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 8% 3% Slightly Optimistic 26% 30% Slightly Pessimistic...
A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 250 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 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 7% 6% Slightly Optimistic 9% 6% Slightly Pessimistic...
A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 250 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 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% 13% Slightly Optimistic 12% 17% Slightly Pessimistic...