Question

Many manufactuning companies use molded parts as components of a process Shrinkage is often a major problem Thus, a molded die for a part is built larger nominal size to allow for part shrinkage. In an injection modeling study, it is known that the shrinkage is influenced by many factors among which are the injection velocity in it sec and mold temperature in degrees Celsius. The accompanying data sets show the results of a designed experiment in which injection velocity was at two levels (low and high) and mold temperature was held constant at a high level Complete parts(a) through (c) below Click the icon to view the shrinkage data (a) Construct a dot plot with both data sets on the same graph and identity both means Click here to view dotplota Click here to view.dollot Click here to view dotplot cck here to view ligt. The mean for the low injection velocity groups The mean for the high injection velocity group is (Type integers or decimals Do not round) (b) Comment on the influence of injection velocity on shrinkage for the highmod temperature Take into account the position of the two means and the variability around each mean Compared to the low injection velocity group, Shrinkage values are compared to the variation for the low injection velocity group for the high injection velocity group The variation for the high injection velocity group is C) A separate experiment in which the mold temperature was held constant at a low lever found that shrinkage values were lower for the high inyection velocity group and that the variation of the shrinkage is a little lower for the high injection velocity group Compare your conclusion in (b) to this result Would you say that there is an interaction between rection velocity and mold temperature? Explain Click to select your answer(s).

Answer 1

(a) The dot plots are:

Dotplot of Low, High Low High 75 78 81 84 87 90 93

DotPlot 75.4 75.6 75.8 76 76. 2 7 6.4 76.6 Low

DotPlot . . . . 92.5 . 93 . 93.5 91.5 92 94 94.5 95 High

	Low	High
mean	76.0470	93.0250

(b) greater, high