2) The Life Saving Foundation reports the average age of lifeguards and rescue divers. Their findings are based on a sur

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2 The Life Saving Foundation Reports The Average Age Of Lifeguards And Rescue Divers Their Findings Are Based On A Sur 1 (69.68 KiB) Viewed 59 times

2) The Life Saving Foundation reports the average age of lifeguards and rescue divers. Their findings are based on a survey covering 20 lifeguards and 15 rescue divers. The mean age of sampled lifeguards is 24 with a standard deviation of 2,5; while their sample composed of rescue divers point out to an average age of 29 with a standard deviation of 2. a) Some local journalist claims in his article that the mean age of lifeguards is more than 24. Test this claim according to the data given in The Life Saving Foundation's report at a=0.05 b) Construct a 95% confidence interval on the difference between the mean age of lifeguards and rescue divers. (a=0.05)