Question

10. According to the U.S. National Center for Education Statistics, there are more than 63 million American workers 18 years old and over who use computers at work. From this study, which was conducted in 1994 and 1998 (Source: Statistical Abstract of the United States, 2000, Table 690), the following table of joint probabilities was developed. A. What proportion of workers use a spreadsheet?_ B. What proportion of male workers use a spreadsheet?_ Computer Usage Gender Uses Spreadsheet No Spreadsheet Use Female 0.34 0.24 Male 0.22 0.2 C.What proportion of spreadsheet users are female?

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Answer 1

0.2 (A) P(use a spreadsheet) = 0.34+0.2 = 0.54 (B) P(male workers use a spreadsheet) = nama = 0.37037 0.34 +0.2 (C)P(female) = 0.34 +0.24 = 0.58