شابتر 8
انصحك بيدك احسنلك
جربت كثير بالاكسل ماعرفت من وين
________________________
شابتر 9
كنت بشرح اكثر من كذا بس صعبه لأني للحين ماخلصت دراسه اعذرني اخوي
سلايد 12
The American Management Association wishes to have information on
the mean income of middle managers in the retail industry. A
random sample of
256 managers reveals a sample mean of
$45,420. The standard deviation of this population is $
2,050. The
association would like answers to the following questions:
1
2
3
بالتوفيق