The Hersh Corporation is considering two word-processing systems for its computers. One factor that will influence its decision is the ease of use in preparing a business report. Consequently, nine typists were selected from the clerical pool and asked to type a typical report using both word-processing systems. The typists then rated the systems on a scale of 0 to 100. The resulting ratings are in the file Hersh.
a. Which measurement level describes the data collected for this analysis?
b. (1) Could a normal distribution describe the population distribution from which these data were sampled? (2) Which measure of central tendency would be appropriate to describe the center of the populations from which these data were sampled?
c. Choose the appropriate hypothesis procedure to determine if there is a difference in the measures of central tendency you selected in part b between these two word-processing systems. Use a significance level of 0.01.
d. Which word-processing system would you recommend the Hersh Corporation adopt? Support your answer with statistical reasoning.