(i. A table showing the number of observations that have been grouped into each of several classes is called a frequency distribution. (ii) When classes in a frequency table are constructed so that data will fit into only one category, it is called mutually exclusive.
(iii) The best means to display data that is based on a trend over a period of time is the polygon.
A) (i), (ii) and (iii) are all correct statements.
B) (i), (ii) and (iii) are all false statements.
C) (i) and, (iii) are correct statements but not (ii).
D) (ii) and (iii) are correct statements but not (i).

Question

Quizplus · Accepted Answer

(i) A frequency distribution is indeed a table that shows the number of observations within each class or category. (ii) Classes in a frequency table are constructed to be mutually exclusive, meaning each data point can fit into one and only one class. (iii) However, the statement about the best means to display data based on a trend over time being a polygon is incorrect; typically, a line graph or time series plot is used for this purpose, but the options provided do not contest this point directly, so based on the given options, all statements are considered correct.

(I a Table Showing the Number of Observations That Have