A Random Sample of 30 Long Distance Runners Aged 20-25

question 27

Short Answer

A random sample of 30 long distance runners aged 20-25 was selected from a running club.
The resting heart rates (in beats per minute) of the runners are shown below. Estimate the mean resting heart rate for the population of long distance runners aged 20-25. Give the 95% confidence interval to one decimal place. The sample mean is 68 and the sample standard deviation is 8.133. $$\begin{array} { l l l l l l l l l l } 62 & 70 & 61 & 64 & 75 & 54 & 72 & 68 & 74 & 54 \\75 & 70 & 62 & 66 & 79 & 73 & 81 & 60 & 66 & 76 \\67 & 62 & 62 & 73 & 70 & 86 & 76 & 60 & 53 & 69\end{array}$$

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Definitions:

REM Sleep

A stage of sleep characterized by rapid eye movements, where the brain is highly active and vivid dreaming is most common.

Dreaming

A mental process that occurs during sleep, characterized by narratives or images that are often symbolic or nonsensical.

Night's Sleep

A period of sleep taking place during the night, important for physical and mental recovery and health.

Brain Waves

Electrical impulses in the brain that are visible on an electroencephalogram (EEG), indicative of different states of consciousness.