The Standard Error Of $\bar { Y } , S E ( \bar { Y } ) = \hat { \sigma } _ { \bar { Y } }$

question 7

Multiple Choice

The standard error of $\bar { Y } , S E ( \bar { Y } ) = \hat { \sigma } _ { \bar { Y } }$
is given by the following formula:

• A) \(\frac { 1 } { n } \sum _ { i = 1 } ^ { n } \left( Y _ { i } - \bar { Y } \right) ^ { 2 }\)
• B) \(\frac { s _ { Y } ^ { 2 } } { n } .\)
• C) \(S _ { Y }\)
• D) \(\frac { s _ { Y } } { \sqrt { n } }\)

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