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

## 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

 ```1 2 3 4 5 6 7 8 9``` ```freq1way( counts, hypothprob, conf.level = 0.95, addCIs = TRUE, 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

 ```1 2 3 4 5``` ```##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. 23, 2021, 9:15 a.m.