Apologies for my deadline induced hastiness, which I hope will not be interpreted as laziness. I found the following post further down.
I'm hoping the Excel file posted there will solve my problems? Inputting the following:
Avg 52.000 35.000
SD 29.800 21.900
n 10 45
I get the following results:
Pooled Std Dev 9.973
Computed t Statistic 1.705
Critcal Value of t 2.006
Probability of Computed t 0.094
and am hoping I can interpret the 0.094 value as my p-value. If so, a warm thanks will be heading in JohnM's direction.