A researcher records the crying time (in minutes) of infancy’s given oral administration of sucrose (n=10) prior to a heel prick. The mean cruise my time has j the sucrose aw ground was M=3 (s2 = 9);...

A researcher records the crying time (in minutes) of infancy’s given oral administration of sucrose (n=10) prior to a heel prick. The mean cruise my time has j the sucrose aw ground was M=3 (s2 = 9); in the tap water group, it was M=7 (s2=4) min. Calculate the pooled variance for this study. (1 dec place) _______