Reference no: EM132167152

A fellow-student is testing H0:μ=42 against Ha:μ>42, at the 5% significance level. He gets t=1.812 and a right-tailed P-value of 0.043. He decides to reject H0. In reviewing his work, you realize his alternative hypothesis should have been Ha:μ≠42. How does this affect his P-value and the conclusion of his test?

Which of the following is correct?

• He needs to divide his P-value by 2. He should still reject H0.
• He needs to divide his P-value by 2. He should fail to reject H0.
• He needs to multiply his P-value by 2. He should still reject H0.
• He needs to multiply his P-value by 2. He should fail to reject H0.
• His P-value won't change. He should still reject H0.
• His P-value won't change. He should fail to reject H0.