Two Means - Unknown, Unequal Variance: Videos & Practice Problems

A psychologist claims that stress levels differ between graduate and undergraduate students. The table below shows stress scores (on a $40$-point scale) for $10$ graduate and $8$ undergraduate students. At $\alpha =0.01$, is there sufficient evidence to support the psychologist's claim?
Graduate: $28$, $32$, $30$, $35$, $31$, $29$, $34$, $33$, $30$, $32$
Undergraduate: $22$, $24$, $27$, $25$, $23$, $26$, $28$, $25$