Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
一枚硬币掷100次,出现60次正面。在5%水平上,硬币是公正的吗?
一枚硬币掷100次,出现60次正面。在5%水平上,硬币是公正的吗?
Natural Language
Math Input
Extended Keyboard