Mathematics, 30.07.2019 07:30 meaghan18
At the beginning of a call to the cable company, a message tells customers, “after you finish talking to our customer service representative, you will be asked to take a five-question survey about the level of service you received. it would be appreciated if you could stay on the line to answer the survey questions.” what type of sampling is the cable company using? systematic random sampling voluntary sampling cluster sampling convenience sampling
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In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.
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