summary1way {s20x}

One-way Analysis of Variance Summary

Description

Displays summary information for a one-way anova analysis. The lm object must come from a numerical response variable and a single factor. The output includes: (i) anova table; (ii) numeric summary; (iii) table of effects; (iv) plot of data with intervals.

Usage

summary1way(
  fit,
  digit = 5,
  conf.level = 0.95,
  inttype = "tukey",
  pooled = TRUE,
  print.out = TRUE,
  draw.plot = TRUE,
  ...
)

Arguments

fit

an lm object, i.e. the output from lm.

digit

decimal numbers after the point.

conf.level

confidence level of the intervals.

inttype

three options for intervals appeared on plot: 'hsd','lsd' or 'ci'.

pooled

two options: pooled or unpooled standard deviation used for plotted intervals.

print.out

if TRUE, print out the output on the screen.

draw.plot

if TRUE, plot data with intervals.

...

more options.

Value

Df

degrees of freedom for regression, residual and total.

Sum of Sq

sum squares for regression, residual and total.

Mean Sq

mean squares for regression and residual.

F value

F-statistic value.

Pr(F)

Main Effect

Group Effects

See Also

summary2way, anova, aov, dummy.coef, onewayPlot

Examples

attitudes = c(5.2,5.2,6.1,6,5.75,5.6,6.25,6.8,6.87,7.1,
               6.3,6.35,5.5,5.75,4.6,5.36,5.85,5.9)
l = rep(c('Gp1','Gp2','Gp3'),rep(6,3))
l = factor(l)
f = lm(attitudes ~ l)
result = summary1way(f)
result