Reliability of reverse-cycle air conditioners
When the variable of most interest has only two categories and all probabilities for one category are small, standard clustered and stacked bar charts do not display differences between the groups well.
Choose Propns for Needed repair to show a simple bar chart of the proportions.
The Australian consumer magazine Choice conducted a survey of subscribers in November 1995 to assess reliability of air conditioners. Each respondent who owned an air conditioner was asked about the brand and whether it had needed any repairs in the previous 12 months.
Brand | Sample size | Percentage requiring repairs |
---|---|---|
Panasonic Sanyo Fujitsu Westinghouse Mitsubishi Emailair Kelvinator Carrier |
169 51 77 99 85 104 188 169 |
2 6 7 7 9 13 13 15 |