Postexposure radiation levels are approximately Normally dis

Post-exposure radiation levels are approximately Normally distributed with mean . The levels (in Sv) of a random sample of three trauma victims who were recently exposed are 5.5, 6.2, and 4.8.

Based on this data, what is the standard error of the estimate for a 95% confidence interval?

0.404

0.792

0.329

0.495

Solution

The standard deviation of the 3 values here is

s = 0.7

Thus, the standard error is given by

SE = s/sqrt(n) = 0.7/sqrt(3) = 0.404 [ANSWER, A]