Dataset a has a mean of 215 and a standard deviation of 35. dataset b has a mean of 400 and a standard deviation of 12. which data set is more spread out?

Dataset A is more spread.

Step-by-step explanation:

The measure of spread is also known as Measure of Skewness.

For measuring the spread standard deviation is a commonly used method. As Standard deviation is the square root of the sum of square of the distance of mean value to the observation.

Thus the dataset has more standard deviation is consider as data has more spread.

Since Dataset A has more standard deviation it has more spread than dataset B.