Question

body and exam measurements were collected from 300 subjects. the pulse rates from 100 males have a mean of 68.7 beats per minute and a standard deviation of 10.8 beats per minute. use the range - rule of thumb for identifying significant values to identify the limits separating values that are significantly low or significantly high. is a pulse rate of 70.0 beats per minute significantly low, significantly high, or neither? (all of these pulse rates are measured at rest.) explain.
click the icon to view the male pulse rates.

significantly low values are 47.1 beats per minute or lower.
(type an integer or a decimal. do not round.)
significantly high values are beats per minute or higher.
(type an integer or a decimal. do not round.)

Explanation:

Step1: Recall the range - rule - of - thumb formula

The range - rule - of - thumb for significant values: Significantly low values are $\mu - 2\sigma$ or lower, and significantly high values are $\mu+ 2\sigma$ or higher, where $\mu$ is the mean and $\sigma$ is the standard deviation.
Given $\mu = 68.7$ and $\sigma=10.8$.

Step2: Calculate the significantly high value

Use the formula $\mu + 2\sigma$.
Substitute the values of $\mu$ and $\sigma$ into the formula: $68.7+2\times10.8$.
First, calculate $2\times10.8 = 21.6$.
Then, $68.7 + 21.6=90.3$.

Answer:

$90.3$