PRED: Soldering Points

In mistat: Data Sets, Functions and Examples from the Book: "Modern Industrial Statistics" by Kenett, Zacks and Amberti

Soldering Points

Description

1,000 records on variable x and y. x is the number of soldering points on a board, and y is the number of defective soldering points.

Usage

data(PRED)

Format

A data frame with 1000 observations on the following 2 variables.

x

Number of soldering points, a numeric vector

y

Number of defective soldering points, a numeric vector

Details

Electronic systems such as television sets, radios or computers contain printed circuit boards with electronic components positioned in patterns determined by design engineers. After assembly (either by automatic insertion machines or manually) the components are soldered to the board. In the relatively new Surface Mount Technology minute components are simultaneously positioned and soldered to the boards. The occurrence of defective soldering points impacts the assembly plant productivity and is therefore closely monitored

Source

Kenett, R. and Zacks, S. (1998) Modern Industrial Statistics: The Design and Control of Quality and Reliability. Duxbury Press.

Examples

data(PRED)

library(boot)

set.seed(123)

YRatioPred <- boot(data=PRED$x, 
                   statistic=function(x,i){
                     mean(x[i[1:100]])*7.495/148.58
                     }, 
                   R=1000)$t

hist(YRatioPred, main="", 
     xlab="", 
     xlim=c(7, 8))

mistat documentation built on March 7, 2023, 6:43 p.m.