A Researcher Estimates the 95% CI for a Sample with a Mean

Multiple Choice

A researcher estimates the 95% CI for a sample with a mean of M = 9.0 and a standard error ( $\sigma$ _M) of 1.03.What is the confidence interval at this level of confidence?

A) 95% CI 7.3, 10.7
B) 95% CI 8.0, 10.0
C) 95% CI 7.0, 11.0
D) There is not enough information to answer this question.