Refer to Table S$61-$ Factors for Computing Control Chart Limits $(3$ sigma$)$ for this problem. executives take samples of eight Eagletrons at a time.

For each sample, they determine the average maximum speed and the range of the maximum speeds within the sample probability that this is due to natural variation.

The control limits for the chart based on the above requirement for the given information are:

$UC{L}_{\frac{?}{\text{b}\text{a}\text{r}}(R)}=$ miles per hour $(round$ the reponse $to$ three decimal places$)$

$LC{L}_{\frac{?}{\text{b}\text{a}\text{r}}(R)}=$ miles per hour $(round$ the reponse $to$ three decimal places$).$