A Paired Difference Experiment Yielded $\mathrm { n } _ { \mathrm { d } }$

Multiple Choice

A paired difference experiment yielded $\mathrm { n } _ { \mathrm { d } }$ pairs of observations. For the given case, what is the rejection region for testing $\mathrm { H } _ { 0 } : \mu _ { \mathrm { d } } = 9$ against Ha: $\mu _ { \mathrm { d } } > 9$ ?
$\mathrm { n } _ { \mathrm { d } } = 27 , \alpha = 0.025$

A) $t < 1.703$
B) $t > 2.056$
C) $t > 2.052$
D) $t < 2.056$