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What is Mean hemoglobin of a group of pregnant females is found to be 10.6 gm/dL with Standard deviation of 2 gm/dL. 5% pregnant females in this group will have their hemoglobin level below and explain in detail?
• Mean + 1SD covers 68% values; So, Hb of 68% pregnant females will lie between 10.6 + 2 gm/dL or between 8.6-12.6
g/dL
- So, 16% will lie below 8.6 gm/dL
• Similarly, Mean + 2SD covers 95% values; So, Hb of 95% pregnant females will lie between 10.6 + 2(2) gm/dL or between 6.6-14.6 gm/dL
- So, 2.5% will lie below 6.6 gm/dL
• So 5% pregnant females will have Hb below 7.31 gm/dL