You wish to test the following claim (HaHa) at a significance
level of α=0.002α=0.002. For the context of this problem,
μd=μ2−μ1μd=μ2-μ1 where the first data set represents a pre-test and
the second data set represents a post-test.
Ho:μd=0Ho:μd=0
Ha:μd≠0Ha:μd≠0
You believe the population of difference scores is normally
distributed, but you do not know the standard deviation. You obtain
pre-test and post-test samples for n=13n=13 subjects. The average
difference (post - pre) is ¯d=5d¯=5 with a standard deviation of
the differences of sd=25.5sd=25.5.
What is the test statistic for this sample? (Report answer accurate
to three decimal places.)
test statistic = _________
What is the p-value for this sample? (Report answer accurate to
four decimal places.)
p-value = _________________
This is a two tailed test
Ho:μd=0
Ha:μd≠0
test statistics:
dbar = 5 , sd = 25.5 , n =13
t = dbar/(sd/sqrt(n))
= 5 /(25.5/sqrt(13))
= 0.707
P value = 2 *(1-P(t < 0.707) ) with df = 12
P value = 0.4931
You wish to test the following claim (HaHa) at a significance level of α=0.002α=0.002. For the...
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1) You wish to test the following claim (HaHa) at a significance level of α=0.02α=0.02. For the context of this problem, μd=μ2−μ1μd=μ2-μ1 where the first data set represents a pre-test and the second data set represents a post-test. Ho:μd=0Ho:μd=0 Ha:μd<0Ha:μd<0 You believe the population of difference scores is normally distributed, but you do not know the standard deviation. You obtain pre-test and post-test samples for n=19n=19 subjects. The average difference (post - pre) is ¯d=−1d¯=-1 with a standard deviation of...
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You wish to test the following claim (H1) at a significance level of α=0.002α=0.002. For the context of this problem, d=x2−x1 where the first data set represents a pre-test and the second data set represents a post-test. Ho:μd=0 H1:μd>0 You believe the population of difference scores is normally distributed, but you do not know the standard deviation. You obtain pre-test and post-test samples for n=22 subjects. The average difference (post - pre) is ¯d=32 with a standard deviation of the...