# freq1way: Analysis of 1-dimensional frequency tables In s20x: Functions for University of Auckland Course STATS 201/208 Data Analysis

 freq1way R Documentation

## Analysis of 1-dimensional frequency tables

### Description

If hypothprob is absent: prints confidence intervals for the true proportions, a Chi-square test for uniformity, confidence intervals for differences in proportions (no corrections for multiple comparisons and plots the proportions.

### Usage

``````freq1way(
counts,
hypothprob,
conf.level = 0.95,
digits = 4,
arrowwid = 0.1,
estimated = 0
)
``````

### Arguments

 `counts` A 1-way frequency table as produced by `table`. `hypothprob` If present, a set of probabilities to test the cell counts against. `conf.level` confidence level for the confidence interval, expressed as a decimal. `addCIs` If true, adds confidence limits to plot of sample proportions. `digits` used to control rounding of printout. `arrowwid` controls width of arrowheads. `estimated` default is `0`. Subtracted from the df for the Chi-square test.

### Details

If hypothprob is present: prints confidence intervals for the true proportions, a Chi-square test for the hypothesized probabilities, and plots the sample proportions (with atached confidence limits) alongside the corresponding hypothesized probabilities. )

### Value

An invisible list containing the following components:

 `CIs` a matrix containing the confidence intervals. `exp` a vector of the expected counts. `chi` a vector of the components of Chi-square.

### Note

These confidence intervals have been Bonferroni adjusted for multiple comparisons. This function has been deprecated and will be removed from future versions of the package

### Examples

``````
##Body image data:
data(body.df)
eth.table = with(body.df, table(ethnicity))
freq1way(eth.table)
freq1way(eth.table,hypothprob=c(0.2,0.4,0.3,0.1))

``````

s20x documentation built on Aug. 21, 2023, 5:07 p.m.