Question

the following pulse rates were recorded for a group of 15 students. the mean pulse rate is 75. how many pulse rates were higher than the mean? 64, 80, 80, 67, 86, 69, 61, 84, 74, 88, 72, 72, 72, 80, 76 how many pulse rates were higher than the mean?

Explanation:

Step1: Compare each data point with the mean

We have the data set: \(64, 80, 80, 67, 86, 69, 61, 84, 74, 88, 72, 72, 72, 80, 76\) and the mean \(\bar{x}=75\).
For \(80\): \(80>75\).
For \(80\): \(80>75\).
For \(86\): \(86 > 75\).
For \(84\): \(84>75\).
For \(88\): \(88>75\).
For \(80\): \(80>75\).

Step2: Count the number of data points greater than the mean

Counting the values \(80\) (occurs \(3\) times), \(86\), \(84\), \(88\). The number of values greater than \(75\) is \(3 + 1+1 + 1=6\).

Answer:

\(6\)