Which of the following confidence intervals also indicates a significant difference between treatments with ? = .05?

a. Estimate that ?1 – ?2 is in an interval between 2 and 10 with 90% confidence
b. Estimate that ?1 – ?2 is in an interval between –2 and 8 with 90% confidence
c. Estimate that ?1 – ?2 is in an interval between 2 and 10 with 95% confidence
d. Estimate that ?1 – ?2 is in an interval between –2 and 8 with 95% confidence


C

Psychology

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Psychology