A known chemical company is developing a patent for a new variant of artificial stone composed mostly of quartz ( 93wt and polyester resin . This company is launching a pilot plant where it begins to produce plates of this material to industry scale. In order to measure the degree of product homogeneity, 50 samples were taken, performed 5 measurements per plate corresponding to different areas of artificial stone Vickers hardness
Format
A data frame with 250 observations on the following 2 variables:
- hardness
A quantitative variable that measure Vickers hardness corresponding to different areas of artificial stone.
- sample
Sample ID
Examples
data(plates)
attach(plates)
#> The following object is masked from orangejuice:
#>
#> sample
summary(plates)
#> hardness sample
#> Min. : 55.98 Min. : 1.0
#> 1st Qu.:180.29 1st Qu.:13.0
#> Median :195.30 Median :25.5
#> Mean :192.05 Mean :25.5
#> 3rd Qu.:204.75 3rd Qu.:38.0
#> Max. :242.69 Max. :50.0
plot(hardness, type="b")
detach(plates)