Question

Test#	1	2	3	4	5	6	Mean	Range
Monday	96	74	92	84	65	77	81.33	31
Tuesday	93	99	73	63	98	76	83.67	36
Wednesday	64	92	101	91	73	90	85.17	37
Thursday	100	67	86	76	99	91	86.50	33
Friday	84	97	76	92	82	99	88.33	23

2) If the engines with NOx emission above 80mg/km are "in violation" of EPA regulations prepare a control chart for monitoring the proportion of engines in violation of the EPA guidelines with a 95% confidence interval. Is the proportion of "in violation" in statistical control during the past five days yes or no explain.

Chart type:

UCL=

CL=

LCL=

Answer 1