Question

The height of a large population of redwood trees is normally distributed. What is the percentage of these heights that are within 1 standard deviation of the mean?

a) 34%
b) 68%
c) 95%
d) 99.7%

Answer 1

Approximately 68% of heights in a normal distribution are within 1 standard deviation of the mean.

Step-by-step explanation:

The percentage of heights that are within 1 standard deviation of the mean in a normal distribution is approximately 68%. This is known as the Empirical Rule, which states that for data with a bell-shaped and symmetric distribution, approximately 68% of the data falls within one standard deviation of the mean.