Solved

The Jth Autocorrelation Coefficient Is Defined as
A) B) C)

Question 17

Multiple Choice

The jth autocorrelation coefficient is defined as


A) cov(Yt,Yt1) var(YJ) var(Yt1) \frac { \operatorname { cov } \left( Y _ { t } , Y _ { t } - 1 \right) } { \sqrt { \operatorname { var } \left( Y _ { J } \right) \operatorname { var } \left( Y _ { t } - 1 \right) } }
B) cov(Yt,Ytj1) var(Yt) var(Ytj) \frac { \operatorname { cov } \left( Y _ { t } , Y _ { t } - j - 1 \right) } { \sqrt { \operatorname { var } \left( Y _ { t } \right) \operatorname { var } \left( Y _ { t - j } \right) } }
C) cov(Yt,ut) var(Yt) var(ut) \frac { \operatorname { cov } \left( Y _ { t } , u _ { t } \right) } { \sqrt { \operatorname { var } \left( Y _ { t } \right) \operatorname { var } \left( u _ { t } \right) } }
D) cov(Yt,Ytj) var(Yt) var(Ytj) \frac { \operatorname { cov } \left( Y _ { t } , Y _ { t } - j \right) } { \sqrt { \operatorname { var } \left( Y _ { t } \right) \operatorname { var } \left( Y _ { t - j } \right) } }

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