The Effects of Listening Skills Instruction on Students' Academic Performance Page: 4
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listening course. The t test was chosen because it can be
used for testing the significance of the difference between
the means of two independent samples. The grade point
averages of the two groups were collected and the means and
standard deviations of the two groups were determined. The
t-value and the probability of rejection of the null
hypothesis were also determined.
The data showed little difference between the mean
scores of the two groups or between the standard deviations
of the two groups. The observed t-value did not support the
hypothesis; therefore, there was insufficient evidence to
reject the null, and the conclusion was that listening
skills instruction has no impact on university students'
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Mangrum, C. W. (Clifton William). The Effects of Listening Skills Instruction on Students' Academic Performance, dissertation, May 1993; Denton, Texas. (digital.library.unt.edu/ark:/67531/metadc278110/m1/4/: accessed November 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .