rewrite this paragraph to make it more academic "This research employs mixed sampling method. We use “Probability Sampling” to divide the target population into clusters(different industries), and a random sample of industries is selected. Then, we used “Non-probability Sampling” to select large capital firms based on their accessibility or availability because the information of other small enterprises can not be found in the database. There should be exactly 6 paragraphs separated by the markdown divider: ***.
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