Question: 20. Post-exposure radiation levels are approximately Normally distributed, with mean . The levels (in Sv) of a random sample of three trauma victims who

20. 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 Sv. What is a 95% confidence interval for u based on these data (hint: s=0.7)?

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