In no more than 3-4 sentences, respond to the following: Provide a null hypothesis and an alternative hypothesis for a research experiment that utilizes the one-tailed test or the two-tailed test. Be sure to clearly specify which one you selected.
For a research experiment utilizing a two-tailed test, the null hypothesis (H0) could be: “There is no significant difference in the mean anxiety levels between patients who receive cognitive-behavioral therapy (CBT) and those who do not.” The alternative hypothesis (H1) could be: “There is a significant difference in the mean anxiety levels between patients who receive cognitive-behavioral therapy (CBT) and those who do not.” This specifies a two-tailed test as it considers the possibility of the effect in both directions (either an increase or a decrease in anxiety levels).
For a research experiment utilizing a two-tailed test, the null hypothesis (H0) could be: “There is no significant difference in the mean anxiety levels between patients who receive cognitive-behavioral therapy (CBT) and those who do not.” The alternative hypothesis (H1) could be: “There is a significant difference in the mean anxiety levels between patients who receive cognitive-behavioral therapy (CBT) and those who do not.” This specifies a two-tailed test as it considers the possibility of the effect in both directions (either an increase or a decrease in anxiety levels).
For a research experiment utilizing a two-tailed test, the null hypothesis (H0) could be: “There is no significant difference in the mean anxiety levels between patients who receive cognitive-behavioral therapy (CBT) and those who do not.” The alternative hypothesis (H1) could be: “There is a significant difference in the mean anxiety levels between patients who receive cognitive-behavioral therapy (CBT) and those who do not.” This specifies a two-tailed test as it considers the possibility of the effect in both directions (either an increase or a decrease in anxiety levels).