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Identify the type of observational study cross sectional retrospective or prospective described below A research...

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Identify the type of observational study cross sectional retrospective or prospective described below A research company uses a device to record the viewing habits of about 2500 households and the data collected over the past 7 years will be used to determine whether the proportion of households tuned to a particular news program increased Which type of observational study is described in the problem statement A cross sectional study A prospective study O A retrospective study

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