Question 2 · LEK · Basics of medical statistics
In a given national population the body mass of women aged 19-25 shows a normal distribution and amounts to an average of 55 kg. The standard deviation is 5.5 kg. How many women are there in this population that weigh less than 49.5 kg?
- A. 5%.
- B. 10%.
- C. 15%.
- D. 16%.
- E. 32%.
Hint
Express 49.5 kg as a distance from the mean in standard deviations and recall the 68-95-99.7 rule.
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