Name that Symbol
Xbar
What is the mean or average?
These are limits set by the process
What are control limits?
Statistical concept that represents how much variation there is in a process relative to customer requirements
What is Process Sigma (or Cpk)
Variation obtained by two or more people measuring the same characteristic in the same way
What is Reproducibility?
After rank ordering the data, it is the middle number
What is the median?
s
What is the symbol for standard deviation?
Variation that is always present in a stable process
What is common cause variation?
This assumption must be met to calculate Process Sigma using Method 2
What is Normally distributed?
Labeling parts in a way to record measurements and remove possible operator bias
What is blind marking?
The square root of the variance
What is the standard deviation?
n
What is the symbol for sample size?
This control chart is used to track proportions over time
What is a p-chart?
Compares the proportions of two groups
What is the test of proportions?
4 characteristics of an acceptable measurement system
What are Appropriate, Accurate, Stable over time and Able to show part to part variation?
Statistical test for comparing the average of 2 samples
What is the t-test?
d
What is the symbol for precision - or half interval width?
Number of points necessary to establish a baseline
What is 20-24?
(1-p)%
What is the percent confidence to conclude the alternate hypothesis is true?
The % measurement error that is acceptable for a continuous measurement method
What is 10% or less?
Statistical test for comparing the variance of 2 samples
What is the F-test?
Z-value
What is the standardized value of "x" in a Standardized Normal Distribution?
This control chart is used to track counts over time
What is the c-chart?
Used to verify the cause and effect relationship between process factors
What is experimentation?
Potential area for misclassification
What is the Zone of uncertainty?
The measure of variability in Y that is explained by X
What is R-squared?