Contents
What data does not follow normal distribution?
There are many data types that follow a non-normal distribution by nature. Examples include: Weibull distribution, found with life data such as survival times of a product. Log-normal distribution, found with length data such as heights.
What is a normal distribution data set?
A set of data is normally distributed with a mean of 5 . A normal distribution is symmetric about the mean. So, half of the data will be less than the mean and half of the data will be greater than the mean. Therefore, 50% percent of the data is less than 5 .
What is the reference level for lead in blood?
This new level is based on the U.S. population of children ages 1-5 years who are in the highest 2.5% of children when tested for lead in their blood. The blood lead reference value is based on the 97.5th percentile of the National Health and Nutrition Examination Survey (NHANES) blood lead distribution in children ages 1-5 years.
When does a child have a lead level of concern?
Until 2012, children were identified as having a blood lead “level of concern” if the test result was 10 or more micrograms per deciliter (µg/dL) of lead in blood. CDC is no longer using the term “level of concern” and is instead using the reference value to identify children who have more lead in their blood than most children.
What’s the average lead level in a child’s blood?
This value is based on the U.S. population of children ages 1-5 years who are in the highest 2.5 percent of children when tested for lead in their blood. If a child has an elevated blood lead level, their doctor may recommend follow-up services.
What does the toxicological profile of lead mean?
This profile reflects ATSDR’s assessment of all relevant toxicologic testing and information that has been peer-reviewed. Staffs of the Centers for Disease Control and Prevention and other Federal scientists have also reviewed the profile.