8.96 Ethnic Cuisine Ethnic groups in North America buy differing amounts of various food prod- ucts because of their ethnic cuisine. Asians buy fewer canned vegetables than do other groups, and Hispanics purchase more cooking oil. A researcher interested in market segmentation for these two groups would like to estimate the proportion of households that select certain brands for various products. If the researcher wishes these estimates to be within 0.03 with probabil- ity 0.95, how many households should she include in the samples?