P OOL 2. Is there a race gap in the use of computers? In 1997, according to the Statistical Abstract of the United States, 34.93 percent of white, non-Hispanic persons used computers (the total number of such persons was 194,746,000); 15.28 percent of 32,339,000 black, non-Hispanic persons used computers; and 13.98 percent of Hispanic persons used computers. Create a cross-tabulation, and percentage it in the correct way. Calculate the Pearson independence chi-squared test, and interpret the result. 3. Here are some sales figures collected by the Recording Industry Association of America describing the cash value of purchases (in millions of dollars) of several genres of music during the 1990s. 1990 Rock $2,722 Country $724 Rap/hip-hop $641 R & B $875 Pop $1,033 Religious $189 Classical $234 Jazz $362 1995 Rock $4,127 Country S2,057 Rap/hip-hop $825 1995 Rock $4,127 Country $2,057 Rap/hip-hop $825 R & B $1,392 Pop $1,244 Religious $392 Classical $357 Jazz $370 1999 Rock $3,675 Country $1,575 Rap/hip-hop $1,576 R & B $1,531 Pop $1,502 Religious $744 Classical $510 Jazz $438 One researcher hypothesizes that, during the 1990s, high-brow genres of music became less popular in the United States. Prepare a table that compares the proportions of all the sales in 1990 that were for high-brow genres (classical or jazz) versus all others, compared to 1999. a. Lay out the table, and percentage it in the proper way to test the hypothesis that the proportion of all music sales that were sales of high-brow genres changed between 1990 and 1999. b. State a null hypothesis and a research hypothesis. c. Calculate the Pearson independence chi-squared statistic. d. Should the null be accepted or rejected at p