Hypothesis Testing

A researcher believes that she has designed a keyboard that is more comfortable to use than a standard keyboard. In order to help decide if this is the case, typing speeds were taken for 8 different people on each keyboard. The lengths of time, in minutes, for each of the people to type a pre-selected manuscript are listed below. Assume the two populations are normal. Use the data to determine if there is a significant difference in time for the two keyboards. Use .05 significance level.

Person Original New