Question

the following pulse rates were recorded for a group of 15 students. find the mean. 75, 77, 63, 65, 68, 61, 79, 68, 67, 62, 67, 72, 74, 83, 69
the mean is

Explanation:

Step1: Sum the data values

$75 + 77+63 + 65+68+61+79+68+67+62+67+72+74+83+69=1043$

Step2: Divide by number of data - points

The number of students (data - points) $n = 15$. The mean $\bar{x}=\frac{1043}{15}\approx69.53$

Answer:

$69.53$