Genral chemistry lab I Measurment Errors ( POpcorn LAB)

1Which type of popcorn shows more variance in kernerl size before popping ?After poping
? In mass loss upon popping ?
2Compare the standard deviations calculated for your data with those from another group. Dose the standard deviation decrease as the size of the data set increase ? If the magnitude of the standard devitation decrease as the size of the data set increases ?what might be the reasons fpr this ?you should do there comparisons for all of the standard deviations calculated ( Unpopped mass, Popped mass and mass lost on popping).
3What were Probable sources of systematic error , and what were the most important sources of random error in this labroatory exercise ?