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The median incomes of females in a random sample of 30 states of the United States, including the District of Columbia and Puerto Rico, are

The median incomes of females in a random sample of 30 states of the United States, including the District of Columbia and Puerto Rico, are given in the table below ('Median income of,' 2013). distribution and a relative frequency distribution using 7 classes. 36027 33459 47476 37089 22117 30752 36048 41817 31238 31329 46185 33424 40550 35438 35746 31844 31067 31274 35484 32843 34381 40500 41412 33865 40969 31330 36931 29688 33269 42113 My question is how can I calculate the frequency?

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