You measure 64 children , obtaining a X of 57.28 . The mean is 56 and sd is 8 Slug says that bc this X is so close to the mean of 56 , this sample could hardly be considered gifted. A. Perform the appropriate statistical procedure to determine whether he is correct

Question

You  measure  64  children ,  obtaining  a  X  of  57.28 .  The mean is 56 and sd is 8 Slug  says  that  bc  this  X  is  so  close  to  the  mean  of  56 ,  this  sample  could  hardly  be  considered  gifted. A. Perform  the  appropriate  statistical  procedure  to determine  whether  he is correct
B. In what percentage  of  the  top scores  is this sample  mean?

PsyDAG · Answer

Z = (score-mean)/SEm

SEm = SD/√n

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score. Relate to level of significance you are using.

Multiply probability by 100 to get percentage.