Quiz 5 Questions and Answer Key - Prob Dens(F-1 Stat-312...

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Stat-312: Quiz #05 Name: Key 1. The body temperature of healthy adults in the US has an unknown distribution. Nationwide data collected by hospitals over the past decade have a mean value of 98.2ºF and a standard deviation of 1.6ºF. These values are generally assumed to be the population parameters. (a) IF the body temperatures of healthy adults are normally distributed with the parameters given above, what is the probability that a healthy adult chosen at random from the US will have a temperature that lies between 98.55ºF and 98.65ºF?
(b) Suppose groups of 25 adults are chosen “at random” from the population, and the mean of each group is calculated. What is the distribution of these sample mean values? Include the distribution type, and numerical values for all parameters.

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