In education, the term instructional technology refers to products such as computers, spreadsheets, CD-ROMs, vidcos, and presentation software. How frequently do professors use instructional technology in the classroom? To answer this question, researchers at Western Michigan University surveyed 306 of their fellow faculty

(Educational Technology, Mar.-Apr. 1995). Responses to the frequency-of-technology use in teaching were recorded as "weekly to every class," "once a semester to monthly," or "never." The faculty responses (number in each response category) for the three technologies are summarized in the next table.

TECHUSE.DAT ..............................................................................................................

Once a Semester1 Technology Weekly Monthly Never Computer spreadsheets 58 67 181 Word processing 168 61 77 Statistical software 37 82 187

a. Determine whether the percentages in the three frequency-of-use response categories differ for computer spreadsheets. Use a = .01.

b. Repeat part a for word processing.

c. Repeat part a for statistical software.

d. Construct a 99% confidence interval for the true percentage of faculty who never use computer spreadsheets in the classroom. Interpret the interval.