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The market shares for four leading smartphone brands ( Brand A , Brand B , Brand C , and Brand D ) in terms of
The market shares for four leading smartphone brands Brand A Brand B Brand C and Brand D in terms of the number of units sold annually in a particular region are reported to be and respectively. A mobile phone retailer in a major city within the region conducted a survey of customers to determine their brand preference and recorded the following sales data:
Brand A: units
Brand B: units
Brand C: units
Brand D: units
Calculate the expected cell frequency Ei for Brand A
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