Dataset 6 Questions 34 & 35 Also please show the steps if possible. A quality an

Question

Dataset 6 Questions 34 & 35

Also please show the steps if possible.

A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that the process standard deviation is two ounces Each day last week, be randomly selected four packages and weighed each. The data from that activity appears below. 34. Referring to Dataset 6, Calculate the UCL and the LCL for the X-bar chart, using plusminus 2sigma a. UCL=21.5; LCL=19.7 b. UCL=23.5; LCL=17.7 c. UCL=11.6; LCL=19.1 d. UCL=31.2; LCL=29.4 e. UCL=22.6; LCL=18.6 35. Referring to Dataset 6, is this process in-control or out-of control? a. Process is in control b. Process is out-of control c. This analysis should have used a p-chart d. Not enough information given to answer this question e. All of the above Dataset 7: Dell purchases chips at $350 per chip from its supplier. The holding cost is $35 per unit the ordering cost is $120 per order, and sales are steady, at 400 per month. The company's supplier decides to offer price concessions in order to attract larger orders, The price shown below:

Explanation / Answer

34.

UCL = 20.6+ 0.729 (2.8) = 22.6412

LCL = 20.6- (0.729* 2.8)= 18.558

hence option (e) 22.6, 18.6 is correct.

35. Plot all the readings on graph. Some of the points lie outside UCL and LCL, hence the graph is out of control.

P1 P2 P3 P4 Average Range Subgrp 1 23 22 23 24 23 2 Subgrp 2 23 21 19 21 21 4 Subgrp 3 20 19 20 21 20 2 Subgrp 4 18 19 20 19 19 2 Subgrp 5 18 20 22 20 20 4 20.6 2.8

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