a) The sample size is _______________ .
b) The frequency of the second class is ________________.
c) The class width of the second class is _______________.
d) The midpoint of the fourth class is _________________.
e) The lower boundary of the third class is _____________.
f) The lower limit of the second class is _______________.
g) The relative frequency of the second and third class are _______________.
h) The upper boundary of the third class is _____________.
i) The relative frequency ( in percentage ) of the fourth class are ____________.