91影视

The mean male pulse rate is equal to 69.6 beats per minute.

The standard deviation of the male pulse rate is equal to 11.3 beats per minute.

The given set of rules are used to compute the limits that separate the significant valuespresent in a dataset. Here, the mean is denoted by $渭$, and the standard deviation is denoted by $蟽$.

Upper limit:$渭+2蟽$

Lower limit: $渭-2蟽$

The values equal to and above the upper limit are significantly high.

The values equal to and below the lower limit are significantly low.

The values in the interval of the limits are not significant.

The following are the calculations involved to compute the limits:

Lower limit:

$$\begin{gathered} 渭-2蟽=69.6-2脳11.3 \\ =69.6-22.6 \\ =47.0 \end{gathered}$$

.

Upper limit:

$$\begin{gathered} 渭+2蟽=69.6+2脳11.3 \\ =69.6+22.6 \\ =92.2 \end{gathered}$$

Therefore, the limits are equal to (47.0 beats per minute, 92.2 beats per minute).

Since the value equal to 50 beats per minute lies in the interval of the limits (47.0,92.2), the value is not significant.