A nurse practitioner works in a clinic that treats low income families in the ci

Question

A nurse practitioner works in a clinic that treats low income families in the city of Flint. She is interested in monitoring blood lead levels in the children (aged 2 to 10 years) who live in the area served by her clinic. She use the following sampling technique.
She identified the elementary school nearest to her clinic, and ask each of the teachers at the school if they would select 10 students from their class for possible participation in the study. 34% of the teachers selected 10 students, and consent form for participation was sent home with the selected students. The response rate for selected students was 96%. State whether each statement is true or false:
A. Selection bias is not present
B. Selection bias is likely to be present.
C. Non-response bias is likely to be a problem D. She can use this sample to reliably estimate blood levels in the population of children living in the city of Flint
D. A simple random sample was used

Explanation / Answer

A )  Selection bias is not present  

------------------------------------ TRUE

B )   Selection bias is likely to be present.

--------------------------------------- FALSE

C )  Non-response bias is likely to be a problem

-------------------------------------------- FALSE

D )  She can use this sample to reliably estimate blood levels in the population of children living in the city of Flint

--------------------------------------- TRUE

E )  A simple random sample was used

------------------------------------- TRUE

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