●●● ●●●● ●●●●● ●●●● The reason that81≠82 ●●0●● ●●●● ●●●● y True difference between two population means √ Chance( sampling error So the hypothesis task is to differentiate that the difference between two samples is from the true difference between two population means or from chance 21/1/292021/1/29 5 The reason that ✓ True difference between two population means. ✓ Chance (sampling error) So the hypothesis task is to differentiate that the difference between two samples is from the true difference between two population means or from chance. 81 82