Thirty-five samples of size 7 each were taken from a? fertilizer-bag-filling machine. The results? were: Overall mean? = 57.75 ?lb.; Average range Upper R overbarR ?= 1.54 lb.
a) For the given sample? size, the control limits for ?3-sigma x overbarx chart ?are:
Upper Control Limit ?= ?(round your response to three decimal? places)
Lower Control Limit = ?(round your response to three decimal? places)
b) The control limits for the? 3-sigma R-chart? are:
Upper Control Limit = ?(round your response to three decimal? places)
?Lower Control Limit = ?(round your response to three decimal? places)