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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At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. the cyclic nature of wind and moving sand determines the shape and location of large dunes. at a test site, the prevailing direction of the wind did not change noticeably. however, the velocity did change. fifty-nine wind speed readings gave an average velocity of x = 1075 cm/sec. based on long-term experience, σ can be assumed to be 245 cm/sec. (a) find a 95% confidence interval for the population mean wind speed at this site. (round your answers to the nearest whole number.) lower limit cm/sec upper limit cm/sec