A sample of n = 30 scores produces a calculated t statistic of t = -2.029. If the researcher is using a one-sample t-test and is testing his hypothesis at the alpha=.05 level, the correct statistical decision is:
The researcher can reject the null hypothesis whether it was a directional or non-directional hypothesis.
The researcher can fail to reject the null hypothesis if this was a directional hypothesis but not if it was a non-directional hypothesis.
It is impossible to make a decision about H0 without more information
The researcher can fail to reject the null hypothesis whether it was a directional or non-directional hypothesis.
The researcher can reject the null hypothesis if this was a directional hypothesis but not if it was a non-directional hypothesis.
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