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Which of the following is not a hard stabilization option?

Which of the following substances is a disaccharide?

Where are the thickest marine sediments located?

Which of the following is a feature of an emerging shoreline?

Which of the following marine resources is used to make wallboard or sheet rock?

In the absence of disease, promyelocytes and myelocytes are normally found in what pool? 

Is there an association between the potential confounder (blood lead level) and the outcome (delayed development)? Draw a 2×2 table to calculate the appropriate measure. (You may use this section to show your calculations for the next question if you wish).

Which of the following sediments contain at least 30% of the hard remains of calcareous-secreting organisms?

Questions 6-9 To take account of the possibility that environmental lead exposure might confound the relationship between birth weight and developmental status, blood lead levels were determined from blood samples collected at the age 3-year visit. Elevated lead levels (> 10 μg/dL) were found in 173 of the low birth weight children (88 of whom had delayed development according to their screening test). Elevated lead levels were also found in 72 of the normal birth weight children (24 of whom had delayed development). Carry out a stratified analysis of birth weight and developmental delay, controlling for blood lead level.

Part B.  Please answer the following questions.