Question

the following data represent the pulse rates (beats per minute) of nine students enrolled in a statistics course. treat the nine students as a population. complete parts (a) to (c).
student pulse
perpetual bempah 64
megan brooks 85
jeff honeycutt 75
clarice jefferson 90
crystal kurtenbach 73
janette lantka 72
kevin mccarthy 84
tammy ohm 82
kathy wojdya 70
(a) determine the population mean pulse.
the population mean pulse is approximately
beats per minute.
(type an integer or decimal rounded to the nearest tenth as needed.)

Explanation:

Step1: Sum all pulse rates

We add up all the pulse rate values: \(64 + 85 + 75 + 90 + 73 + 72 + 84 + 82 + 70\).
Calculating this sum: \(64+85 = 149\); \(149+75 = 224\); \(224+90 = 314\); \(314+73 = 387\); \(387+72 = 459\); \(459+84 = 543\); \(543+82 = 625\); \(625+70 = 695\).

Step2: Divide by number of students

The population mean \(\mu\) is given by the formula \(\mu=\frac{\sum_{i = 1}^{N}x_{i}}{N}\), where \(N = 9\) (number of students) and \(\sum_{i=1}^{N}x_{i}=695\).
So, \(\mu=\frac{695}{9}\approx77.2\) (rounded to the nearest tenth).

Answer:

77.2