19. In a sample of 30 participants, a researcher estimates the 80% Confidence Interval (CI) for...
19. In a sample of 30 participants, a researcher estimates the 80% Confidence Interval (CI) for a sample with a mean of M1-M2=0.7 and an estimated standard error for the difference (SM1-M2) of 0.2. What is the confidence interval at this level of confidence? A) 0.2626-0.4848 B) 0.4374-0.9626 C) 0.5426-0.9735 D) 1.313-1.569 E) There is not enough information to answer this question
Homework Answers
19)
df = 30 - 2 = 28
Critical value = 1.313
Confidence interval is :
(0.7 - 1.313 * 0.2 , 0.7 + 1.313 * 0.2)
(0.4374 , 0.9626)
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