= 64.2  H0: < 64.2 Ha:  Calculate test statistic ZT = 63.0, n= 61, = 2.7 σ Z-test = (63.0 64.2) /(2.7 / ) = x7.81 = -3.47 – Find the p-value P (Z -3.11 ) = 0.0003 ≤ Is the test statistical significant at level = 0.01? Yes, the test is statistical significant at level = 0.01 and reject  H0 because: p-value = 0.0003 < 0.01
H0:  = 64.2 Ha:  < 64.2 Calculate test statistic ZT = 63.0, n= 61, σ = 2.7 Z-test = (63.0 – 64.2) /(2.7 / ) = x7.81 = -3.47 Find the p-value P (Z ≤ -3.11 ) = 0.0003 Is the test statistical significant at level = 0.01? Yes, the test is statistical significant at level  = 0.01 and reject H0 because: p-value = 0.0003 < 0.01
Exam-2-answer-Fall.13.docx