Scores for students on the verbal portion of the SAT-I test are normally distributed with a mean of 509 and a standard deviation of 108. A random sample of 36 students who took the SAT-I test is...

Scores for students on the verbal portion of the SAT-I test are normally distributed with a mean of 509 and a standard deviation of 108. A random sample of 36 students who took the SAT-I test is selected. Let ?̅ represent the mean score of the sample.

3. Find the mean and standard deviation of

?̅, ?.?., ?D̅,?D̅.

?D̅ = 108, (d) ?D̅ =509

?D̅ =3
, (e) ?D̅ = 14.139

?D̅ =3