價格：免費
檔案大小：9.6 MB
版本需求：需要 iOS 8.1 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
The Sample Calculator answers one of the most frequently asked questions in statistics: What size sample do I need?
You provide the estimated population variance (standard deviation) and the allowable error band, choose one of two confidence levels (.95 or .99), and the sample size needed is displayed.
支援平台：iPhone