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Mathematics, 23.02.2021 14:00 RoxanneDuartee

Continuous Issessiner for BUS. 2019 2020 Attempt all questions, time atleed 5mins (15ml)
The duration of Atheimer's disease from the onset of symptoms til death ranges from 3 to 20 year the
average is dyes with a standard deviation of tys. The administrator of a large medical centre randomly selects
the medical records of 30 deceased Alzheimer's patients from the medical centre's data base and record the
average duration. Find the approximate probabilities for these events: (a) The average duration
7yrs (b) The average duration exceeds 7yrs and (c) The average duration lies within 1yr of the population
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