Answer:
mean : (74+89+71+70+68+70)/6=73,66666=73,7
median :
68 70 70 71 74 89
median :(70+71)/2=70,5
mode : 70
the series is fairly homogeneous because the values are not too far apart.
Since the median is close to 70.5, it better represents the central tendency of the data
the high value of 89, makes the average slightly higher than it would be without this value
the high value of 89, makes the average slightly higher than it would be without this value
The mode, although representing a frequent value, may not reflect the central tendency