7. Identify the sampling method that was used. a. To check the accuracy of a machine that is used for filling ice cream containers, every 20th bottle is selected and weighed. b. In a large school district, a researcher numbers all the full-time teachers and then randomly selects 30 teachers to be interviewed. c. Customers in the Sunrise Coffee Shop are asked how much they spend on coffee per week. d. Ten counties in Pennsylvania are randomly selected todetermine the average county real estate tax that the residents pay.

Q: $6. 26 21 25

A: Solution of the problem as follows

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