Question

The graph represents the distribution of the number ofquestions answered correctly on a 50-question mathtest.2428Math Test Scores32364044-48What is the standard deviation of the data?0408O 12O24

Answer 1

From the diagram, the mean of the distribution is 36. The standard deviation is the distrance or gap between the mean and the next number,

Like 36 - 2 = 4, or 40 - 36 = 4.

Hence the standard deviation is 4