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Advanced Placement (AP), 20.05.2021 19:00 emilaw3233
A reporter intends to survey residents of a city to investigate whether there are differences in use of grocery delivery services by region of the city where the residents live (north, south, west, and east). City residents will be asked to respond yes or no to the question “Do you regularly use a grocery delivery service to purchase groceries?” Results will be collected in a 4-by-2 table of counts organized by region and response to the question. For a chi-square test for homogeneity, which of the conditions listed below is not necessary to investigate whether there are differences between use of grocery delivery service by region?
A. For each cell in the table, (row total)(column total)table total will be greater than 5.
B. Data should be collected using a stratified random sample, with region as strata.
C. All eight expected cell counts should be greater than 5.
D. The number of residents sampled from each region should be greater than 30.
E. The total number of residents sampled should be at most 10 percent of the total number of residents in the city.
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