To identify significantly low or significantly high values using the range rule of thumb, we can use the formula:
Significantly Low Value = Mean - (2 * Standard Deviation)
Significantly High Value = Mean + (2 * Standard Deviation)
For this problem, the mean is 76.1 beats per minute and the standard deviation is 11.6 beats per minute.
Significantly Low Value = 76.1 - (2 * 11.6)
Significantly High Value = 76.1 + (2 * 11.6)
Calculating these values:
Significantly Low Value = 76.1 - (2 * 11.6) = 52.9
Significantly High Value = 76.1 + (2 * 11.6) = 99.3
A pulse rate of 69.3 beats per minute falls below the significantly low value of 52.9 beats per minute. Therefore, a pulse rate of 69.3 beats per minute is significantly low.