Question

A column chart can be changed to a pie chart because:

I. Only one data series is used to plot it.

II. The plotted data values are positive.

III. The data values are not equal to zero also.

IV. More than seven categories of data can be represented.

Identify the correct option:

• A. All except point I are correct.
• B. All except point II are correct.
• C. All except point III are correct.
• D. All except point IV are correct.

Hint:

A pie chart shows one series of positive, non-zero values, and not more than seven categories. So point IV is wrong.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
A pie chart shows how parts make up a whole, so it has limits on the data it can take.
We check each of the four points against these limits.

Step 2: Working Out the Answer:
Point I: a pie chart plots only one data series. So a column chart with one series can change to it. This is correct.
Point II: a pie chart cannot show negative values. The plotted values must be positive. This is correct.
Point III: zero values give empty slices, so the values must not be zero. This is correct.
Point IV: a pie chart becomes unreadable with more than seven categories. So this point is not correct.
All the points except IV are correct, which is option (D).

Step 3: Why the Other Options Are Wrong:
Option (A): Option (A) says point I is not correct. But one data series is a real need, so (A) is wrong.
Option (B): Option (B) says point II is not correct. But values must be positive, so (B) is wrong.
Option (C): Option (C) says point III is not correct. But values must be non-zero, so (C) is wrong.

Final Answer:
All except point IV are correct. This is option (D).