<prompt> Translate the following text to EnglishKwa mfano, katika vipimo vya ndani kwa hesabu ya 95 confidence, na katika vipimo vya kati kwa hesabu ya kupotoka kwa kawaida na coefficient ya kutofautiana.  <response>: 1 within tests by calculation of 95 confidence limits, and 2 across tests by calculating a standard deviation and coefficient of variation. 