Any help is much appreciated!! Im just querying some p values generated in SPSS from some data i have recently collected. The three groups were type 1 diabetes, type 2 diabetes and both together (type 1 and 2). Independent t tests were used to analyse depression (normal/ abnormal), fatigue (none/ severe) in relation to sedentary behavior. E.g is higher depression associated with increased sitting time. After collecting data for each group, i have come up with this data:
DEPRESSION: Type 1= 0.039 , Type 2= 0.05 , Type 1 and 2= <0.01
FATIGUE Type 1= 0.122 , Type 2= 0.012 , Type 1 and 2= <0.01
My question is how can the both group (type 1 and 2) be highly statistically significant if the other groups aren't? Does this look correct? Thank you!!