CAPM (Certified Associate in Project Management) Practice Exam

Which statistical concept involves a symmetrical distribution?

1. Triangular Distribution

2. Beta Distribution

3. Normal Distribution

4. Uniform Distribution

The correct answer is: Normal Distribution

The correct answer is Normal Distribution because it is a statistical concept that involves a symmetrical distribution. In a normal distribution, the data forms a bell-shaped curve where the mean, median, and mode are all equal, and the distribution is symmetrical around the mean. This type of distribution is commonly seen in various natural phenomena and is important in statistical analysis and hypothesis testing. In contrast: - Triangular Distribution is characterized by a triangular shape where values are more likely to occur in the middle range and less likely towards the extremes. - Beta Distribution is a continuous probability distribution defined on the interval [0, 1], which is not necessarily symmetrical. - Uniform Distribution is characterized by a constant probability where all outcomes are equally likely to occur, resulting in a rectangular-shaped distribution.