(i. A frequency distribution is grouping of data into classes showing the number of observations in each class. (ii) In constructing a frequency distribution, you should try to have open-ended classes such as "Under $100" and "$1,000 and over".
(iii) A cumulative frequency distribution is used when we want to determine how many observations lie above or below certain values.
A) (i), (ii) and (iii) are all correct statements.
B) (i) and, (ii) are correct statements but not (iii).
C) (i) and, (iii) are correct statements but not (ii).
D) (ii) and, (iii) are correct statements but not (i).

Question

Quizplus · Accepted Answer

Explanation: (i) is correct as it accurately describes a frequency distribution. (iii) is correct because a cumulative frequency distribution indeed shows the accumulation of observations up to a certain class, helping to determine how many observations lie above or below certain values. (ii) is incorrect because, in constructing a frequency distribution, open-ended classes are generally avoided to ensure each observation falls into a specific class, enhancing clarity and analysis.

(I a Frequency Distribution Is Grouping of Data into Classes