Parts (a),(b) and (c):

Parts (d),(e) and (f):

Parts (a) and (b):

Part (c):

Parts (a) and (b):

Parts (c),(d) and (e):

Parts (a) and (b):

Parts (c),(d) and (e):

Parts (f):

Any of these comments: Use the median since the data is skewed or less affected by outliers / extreme values.

Parts (g):

Any one of these comments: If the data are symmetrical or skewness is zero or normal/uniform distribution.

Part (a):

One of these answers: Time is a continuous variable or data is in a grouped frequency table.

Part (b):

Area is proportional to frequency

Parts (c) and (d):

Part (a):

Part (b):