Question

Directional versus nondirectional hypothesis testing. Cho and Abe (2013) provided a commentary on the appropriate use of one-tailed and two-tailed tests in behavioral research. In their discussion, they outlined the following hypothetical null and alternative hypotheses to test a research hypothesis that males self-disclose more than females:

• H0: µmales − µfemales ≤ 0
• H1: µmales − µfemales > 0

1. What type of test is set up with these hypotheses, a directional test or a nondirectional test?

Do these hypotheses encompass all possibilities for the population mean? Explain.

Answer 1

1)

Setting up hypothesis:

Ho: (umales- ufemales)≤0

H1:(u males- ufemalea)>0

This is one tailed test(right tailed test) as alternative hypothesis contain only > sign.

Ans→directional test.

2)Do these hypotheses encompass all possibilities for the population mean

Ans→yes,

i)because if population mean of difference is less than or equal to zero,it comes under Null hypothesis.

ii) if population of difference is greater than zero, it comes under alternative hypothesis.

Thanks!