heads.data: Machine heads data

In BHH2: Useful Functions for Box, Hunter and Hunter II

Description

Data set of the variability of machine heads in a quality improvement experiment.

Usage

data(heads.data)

Format

A data frame with 30 observations on the following 6 variables.

obs

numeric. Observation number.

periods

factor. Periods factor (P1, ..., P6).

heads

factor. Type of head factor (H1, ..., H5).

days

factor. Day factor (D1 and D2).

shifts

factor. Shift factor (S1, S2, and S3).

resp

numeric. Response.

Source

Box, G. E. P. (1993). "How to Get Lucky". Quality Engineering, Vol. 5, No. 3, pp 517-524.

References

Box G. E. P, Hunter, J. S. and Hunter, W. C. (2005). Statistics for Experimenters II. New York: Wiley.

Examples

data(heads.data)
str(heads.data)
plot(heads.data)

Example output

'data.frame':	30 obs. of  6 variables:
 $ obs    : int  1 2 3 4 5 6 7 8 9 10 ...
 $ periods: Factor w/ 6 levels "P1","P2","P3",..: 1 1 1 1 1 2 2 2 2 2 ...
 $ heads  : Factor w/ 5 levels "H1","H2","H3",..: 1 2 3 4 5 1 2 3 4 5 ...
 $ days   : Factor w/ 2 levels "D1","D2": 1 1 1 1 1 1 1 1 1 1 ...
 $ shifts : Factor w/ 3 levels "S1","S2","S3": 1 1 1 1 1 2 2 2 2 2 ...
 $ resp   : int  20 14 17 12 22 16 19 16 17 21 ...

BHH2 documentation built on May 1, 2019, 6:27 p.m.