Question

A researcher believes the number of words typed per minute depends on the type of keyboard one is using. He conducts an experiment using two keyboard designs to determine whether the type of keyboard has an effect on number of words typed per minute. He predicts there will be a significant difference between the two keyboards. In the above research example, a one-tailed test would be conducted? True O False

Answer 1

True

The researcher believes that the number of words typed per minute will be higher with one type of keyboard than the other. This means that the researcher is only interested in one direction of the difference, and not the other. For example, the researcher is not interested in whether the number of words typed per minute is lower with one type of keyboard than the other.

Therefore, a one-tailed test would be conducted. A one-tailed test is a statistical test in which the researcher is only interested in one direction of the difference.