A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 250250 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 250250 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 50%50% 52%52% Slightly Optimistic 16%16% 10%10% Slightly Pessimistic 11%11% 15%15% Pessimistic 23%23% 23%23% Copy Data Step 6 of 10 : Find the value of the test statistic. Round your answer to three decimal places. Step 7 of 10: Find the degrees of freedom associated with the test statistic for this problem Step 8 of 10: Find the critical value of the test at the 0.025 level of significance. Round your answer to three decimal places. step 9 of 10: make the decision to reject or fail to reject the null hypothesis at 0.005 level of significance.
A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 250250 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 250250 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 | 50%50% | 52%52% |
| Slightly Optimistic | 16%16% | 10%10% |
| Slightly Pessimistic | 11%11% | 15%15% |
| Pessimistic | 23%23% | 23%23% |
Copy Data
Find the value of the test statistic. Round your answer to three decimal places.
Step 7 of 10: Find the degrees of freedom associated with the test statistic for this problem
Step 8 of 10: Find the critical value of the test at the 0.025 level of significance. Round your answer to three decimal places.
step 9 of 10: make the decision to reject or fail to reject the null hypothesis at 0.005 level of significance.
step 10 of 10:
state the conclusion of the hypothesis test at the 0.005 level of significance
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