Casio FX-83ES – サポートフォーラム

mean [Casio FX-83ES - 136829]

Hi, I am currently doing OU maths for science course.The course text asks us to work out the mean and standard deviation of various data using a calculator. The trouble is, I have lost my instruction book and cant work out how to do it. The cover of the calculator seems to indicate that there is an X (overscore) button, but try as i might I just cant see it. Please help if you can, I cant move on without it. Thanks very much Jacqui