Asked by Kendra Gorsline on Jun 22, 2024
Verified
Find the control limits for the R-chart with 
= 0.02 and sample size of 15.
A) LCL = 0.007 and UCL = 0.033
B) LCL = 0.004 and UCL = 0.004
C) LCL = 0.003 and UCL = 0.007
D) The R is too small to determine control limits.
R-chart
An R-chart is a type of control chart used in statistical process control to monitor the range of the process variation, helping businesses ensure product quality.
Control Limits
These are thresholds set in statistical process control that indicate the bounds of acceptable performance, identifying when a process is out of control.
Sample Size
The number of individuals or observations included in a sample, which represents a subset of a larger population.
- Determine and compute the boundaries for control in quality evaluation charts utilizing available data.
- Identify the importance and use of the R-chart in observing variability in processes.
Verified Answer
MT
Mangal ThombeJun 27, 2024
Final Answer :
A
Explanation :
The control limits for the R-chart are:
LCL = D3* = 0.007
UCL = D4* = 0.033
where D3=0 and D4=2.282 (for a sample size of 15). Therefore, the answer is A.
LCL = D3* = 0.007
UCL = D4* = 0.033
where D3=0 and D4=2.282 (for a sample size of 15). Therefore, the answer is A.
Learning Objectives
- Determine and compute the boundaries for control in quality evaluation charts utilizing available data.
- Identify the importance and use of the R-chart in observing variability in processes.