Identifying a Normal Distribution Graph

00:00 2 marks

Below are four descriptions of distribution curves:

1. A curve that is symmetric, bell-shaped, and unimodal with tails that approach, but never touch, the horizontal axis.

2. A curve that is skewed to the right with a long tail on the right side.

3. A curve that is skewed to the left with a long tail on the left side.

4. A curve with two distinct peaks (bimodal).

Identify which description best represents a normal distribution and briefly justify your choice.

Hint Hint

Hint

Consider the key characteristics of a normal distribution: symmetry around the mean, a bell shape, a single peak, and tails that extend indefinitely without touching the x-axis.

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Answer Answer

Complete Answer

Description 1 best represents a normal distribution.

Mark Scheme Mark Scheme

Answer Explanation Answer Explanation

Examiner Tips Examiner Tips

Common Errors Common Errors

Focus Focus

Formula Booklet