91影视

A set of 107 body temperatures of adults are recorded in degrees Fahrenheit.

The mean adult temperature is equal to 98.20${}^{鈭�}\text{F}$.

The standard deviation of the adult temperature is equal to 0.62${}^{鈭�}\text{F}$

Considering the mean value $渭$and the standard deviation $蟽$, the following are the three conventions under the range rule of thumb that are applied to distinguish significant values.

• Observations equal to and beyond $渭+2蟽$ are significantly high.
• Observations equal to and lower than$渭-2蟽$ are significantly low.
• Between these two limits lie all the insignificant observations.

The calculations are done as follows:

Lower limit:

$$\begin{gathered} 渭-2蟽=98.20-2脳0.62 \\ =98.20-1.24 \\ =96.96 \end{gathered}$$

.

Upper limit:

$$\begin{gathered} 渭+2蟽=98.20+2脳0.62 \\ =98.20+1.24 \\ =99.44 \end{gathered}$$

Therefore, the limits are obtained as $\left(96.96{}^{鈭�}F,99.44{}^{鈭�}F\right)$.

As the value of the adult body temperature equal to 100${}^{鈭�}\text{F}$is beyond the upper limit of 99.44${}^{鈭�}\text{F}$, the value of 100${}^{鈭�}\text{F}$issignificantly high.