SOLUTION: One measure of physical fitness is the amount of time it takes for the pulse rate to return to normal after exercise. A random sample of 100 women age 40 to 50 exercised on station

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Question 1102198: One measure of physical fitness is the amount of time it takes for the pulse rate to return to normal after exercise. A random sample of 100 women age 40 to 50 exercised on stationary bicycles for 30 minutes. The amount of time it took for their pulse rates to return to pre-exercise levels was measured and recorded. If the times are normally distributed with a standard deviation of 2.3 minutes, estimate with 99% confidence the true mean pulse-recovery time for all 40- to 50-year-old women. Interpret the results.
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
The half interval is +/- t(0.995, df=99)*s/sqrt(n)
t=+/-2.62
+/-2.62*2.3/10=0.6026
It is +/-0.6026 min on either side of the mean, or +/-about 36 seconds