Question

The following data represent the pulse rate of ten randomly selected females stepping up and down on a 6-inch platform for 3 minutes. Pulse is measured in beats per minute. 136 169 120 128 129 143 115 146 96 86 Are there any potential outliers?

a.	No outliers because the "good" range is between 73 and 185.
	b.	No outliers because the "good" range is between 151.07 and 102.53.
	c.	No outliers because all values are within 2 standard deviations of the mean.
	d.	No outliers because the "good" range is between 78.26 and 175.34
	e.	No outliers because all values are within 1 standard deviations of the mean.

Answer 1

The correct option is A

No outliers because the "good" range is between 73 and 185.

Explanation:

Checking for Outliers
Q1 = First Quartile = Middle of First Half of Data Set = 115

Q3 = Third Quartile = Middle of Second Half of Data Set = 143

IQR = Interquartile Range = Q3 - Q1 = (143) - (115) = 28

Lower Fence = Q1 - 1.5*(Interquartile Range) = 73

Upper Fence = Q3 + 1.5*(Interquartile Range) = 185


Note: A data value is considered to be an outlier if it is less than the lower fence or greater than the upper fence.

List of Outlier(s):

No Outliers