The mean of the sample average $\bar { Y }$ , $E ( \bar { Y } )$ , is
A) $\frac { 1 } { n } \mu _ { \gamma }$
B) $\mu_y$
C) $\frac { \mu _ { y } } { \sqrt { n } }$
D) $\frac { \sigma _ { y } } { \mu _ { y } }$ for n 30.

Question

The mean of the sample average $\bar { Y }$ , $E ( \bar { Y } )$ , is
A) $\frac { 1 } { n } \mu _ { \gamma }$
B) $\mu_y$
C) $\frac { \mu _ { y } } { \sqrt { n } }$
D) $\frac { \sigma _ { y } } { \mu _ { y } }$ for n > 30.

Quizplus · Accepted Answer

The mean of the sample average $\bar { Y }$ , $E ( \bar { Y } )$ , is $\mu_y$.

The Mean of the Sample Average Yˉ\bar { Y }Yˉ E(Yˉ)E ( \bar { Y } )E(Yˉ)

The Mean of the Sample Average $\bar { Y }$ $E ( \bar { Y } )$