To test a new product, a fumigation company measured number of fleas capture in several homes, both before and after fumigation using this product. Assume that these homes can be considered a random sample of all homes the company has and will fumigate with this product. The before and after flea counts are given in this table: Home A B C D E F G Before 400 500 525 375 570 620 600 After 450 525 510 400 560 700 625   If we want to test whether the number of fleas is lower after using this product, which of the following is the correct standard error to use?     4.69     32.84     52.65     12.41     8.43

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