i need it ASAP. Statistic QUESTION: (a) Explain the method of retrospective study for collecting data. (2 marks) (b) A r

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answerhappygod
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i need it ASAP. Statistic QUESTION: (a) Explain the method of retrospective study for collecting data. (2 marks) (b) A r

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i need it ASAP. Statistic QUESTION:
(a) Explain the method of retrospective studyfor collecting data. (2 marks)
(b) A recent study on robberies for a certain city XYZ showed anaverage of one robbery per 20,000 people. If a city of 80,000people, please identify the probability if three ormore robberies were occurred. (6 marks)
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