Test statistic,
t = (dbar - 0)/(s(d)/sqrt(n))
t = (9.4 - 0)/(9.6/sqrt(15))
t = 3.792
P-value Approach
P-value = 0.0010
The p-value is less than or equal to alpha
Reject teh null
conclusion: option C
You wish to test the following claim (H) at a significance level of a = 0.001....
You wish to test the following claim (Ha) at a significance level of a = 0.001. For the context of this problem, Hd = 42 Hy where the first data set represents a pre-test and the second data set represents a post-test. H:d=0 H:Hd < 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 = 21 subjects. The average difference (post- 4.2...
Homework > Homework 7.2 You wish to test the following claim (H) at a significance level of a = 0.001. For the context of this problem, Md = M2 - My where the first data set represents a pre-test and the second data set represents a post-test. H:Hd = 0 Taith to 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 = 11...
You wish to test the following claim (HaHa) at a significance level of α=0.001α=0.001. 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=12n=12 subjects. The average difference (post - pre) is ¯d=13.9d¯=13.9 with a standard deviation of the...
You wish to test the following claim (HQ) at a significance level of a = 0.02. For the context of this problem, id = 12 - 11 where the first data set represents a pre-test and the second data set represents a post-test. H:Hd = 0 Ha Hd 70 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 13 subjects. The average difference...
You wish to test the following claim (H1H1) at a significance level of α=0.001α=0.001. For the context of this problem, d=x2−x1d=x2-x1 where the first data set represents a pre-test and the second data set represents a post-test. Ho:μd=0Ho:μd=0 H1:μd>0H1: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=148n=148 subjects. The average difference (post - pre) is ¯d=1.7d¯=1.7 with a standard deviation of the...
You wish to test the following claim (H) at a significance level of a = 0.02. For the context of this problem, u = PostTest - Prel'est where the first data set represents a pre-test and the second data set represents a post-test. (Each row represents the pre and post test scores for an individual. Be careful when you enter your data and specify what your and are so that the differences are computed correctly.) Hd = 0 H: 70...
You wish to test the following claim (H1) at a significance level of α=0.005. 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=40 subjects. The average difference (post - pre) is ¯d= −7.7 with a standard deviation of...
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...
You wish to test the following claim (HaHa) at a significance level of α=0.05α=0.05. 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=8n=8 subjects. The average difference (post - pre) is ¯d=5.2d¯=5.2 with a standard deviation of the...
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...