Question

Three samples were taken of 4 different dog food bags and their weights were recorded:

Sample/Observation	1	2	3	4	Mean	Range
1	30.0	29.0	28.3	27.4	28.675	2.6
2	31.5	30.5	32.6	29.5	31.025	3.1
3	28.2	29.7	30.5	30.7	29.775	2.5

Find the LCL for the xbar-chart.

	a.	32.62
	b.	27.83
	c.	31.82
	d.	27.02

Answer 1