Multiple Choice
A researcher estimates the 90% CI for a sample with a mean of M = 8.9 and a standard error ( ) of 2.1.What is the confidence interval at this level of confidence?
A) 90% CI 4.8,13.0
B) 90% CI 5.5,12.4
C) 90% CI 6.8,11.0
D) There is not enough information to answer this question.
Correct Answer:

Verified
Correct Answer:
Verified
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