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Determine which of the four levels of measurement (nominal, ordinal, interval, ratio} is most appropriate. Students' grades (A, B, C, D, F) - a test. Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. The subjects in which college students major. Does the given description corresponds to an observational study or an experiment? A quality control specialist compares the output from a machine with a new lubricant to the output of machines with the old lubricant. An education expert wishes to interview teachers from a particular school district. She randomly selects schools from the district and interviews all of the teachers at the selected school. What type of sampling is this? Determine whether the given value is a statistic or a parameter. After inspecting all of 55,000 kilograms of meat stored at the Wurst Sausage Company, it was found that 45,000 kilograms was spoiled. Identify the sample and population. An employee at the local Ice cream parlor asks twenty customers if they like chocolate ice cream. Does the description corresponds to an observational study or an experiment? A T.V. show's executives commissioned a study to gauge the Impact of the show's ratings on the sales of its advertisers. Determine whether the given value ls from a discrete or continuous data set. The height of a 2-year-old maple tree is 28.3 feet