A speech language pathologist records the number of times that children stutter during a 10 minute conversation. In her sample of 15 children, the number of times stuttered ranges from 0 to 21. The speech language pathologist computes the standard deviation on the "number of times stuttered." Is this appropriate given the measurement scale of this variable?

Question

Quizplus · Accepted Answer

The variable "number of times stuttered" is a ratio scale variable because it has a true zero point (indicating no stuttering) and the differences between values are meaningful. Standard deviation is an appropriate measure of variability for ratio scale variables.

A Speech Language Pathologist Records the Number of Times That