Follow-up year Mercury (Hg) poisoning is a serious problem among children, and a

Question

Follow-up year Mercury (Hg) poisoning is a serious problem among children, and amalgam dental fillings are thought to be one source of mercury. The chart above shows the average amount of mercury in urine for a group of children who were randomly assigned to receive amalgam fillings (black dots) and composite fillings (white dots) [Woods et al. EHP 1 15(10), 2007. The error bars show the 95% confidence intervals. Approximately what was the 95% confidence interval for amalgam fillings in follow-up year 2? 2 O2(2.5,3.3

Explanation / Answer

Correct Answer:

2. [2.5, 3.3]

Explanation:

The 95% confidence interval or amalgam filling in the given diagram is denoted by black dots. So, for the follow up year, approximate confidence interval is given as (2.5, 3.3).

(Please see given diagram for follow up year with black dotted error bar.)

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