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A large study of serum folate levels in women aged 16 - 45years reveals that this parameter is normally distributed, with a mean of 5.0 ng/ml and a standard deviation of 0.5 ng/ml. According to the study results, 95% of serum folate observations in these patients will lie between the following limits.
A- 4.0 and 6.0 ng/ml
B- 4.0 and 5.5 ng/ml
C- 4.5 and 5.5 ng/ml
D- 3.5 and 6.0 ng/ml
E- 3.5 and 6.5 ng/ml
A- 4.0 and 6.0 ng/ml
B- 4.0 and 5.5 ng/ml
C- 4.5 and 5.5 ng/ml
D- 3.5 and 6.0 ng/ml
E- 3.5 and 6.5 ng/ml