Question

Alice works at a health care facility. She has measured the hemoglobin levels of 200 people. The data follows a normal distribution with a mean of 14 g/dL and a standard deviation of 1.
From the given data, we can conclude that about ______(64 or 32) people have hemoglobin levels less than 13, and about ______(100 or 64)people have hemoglobin levels greater than 14.

Answer 1

If the data follows a normal distribution:
Less than 13 ( less than a mean - 1 sigma ): 16% of a population.
0.16 · 200 = 32
Greater than 14 ( 14 is a mean value ): 50% of a population.
0.5 · 200 = 100
Answer: 
... about 32 people have hemoglobin levels less than 13, and about 100 people have hemoglobin levels greater than 14.