Which of the statements below is correct a. Two sample t-test showed no significant effect of alcohol (t = -2.47, df = 9, p > 0.05) Ob. Two sample t-test showed a significant effect of alcohol (t = -1.89, df = 18, p < 0.05) O c. Paired t-test showed a significant effect of alcohol (t = -2.47, df = 9, p <0.05) d. Paired t-test showed no significant effect of alcohol (t = -1.89, df = 18, p >0.05)

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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To investigate the effect of alcohol on fine motor movements, subjects were asked to thread as many needles as
possible during a ten minute period after having consumed (1) 100 ml of colorless, odourless and tasteless 80-proof
grain alcohol (alcohol) and (2) 100 ml of distilled water (water), a week apart and counterbalanced.
Two t-tests were run (lower part of each table is missing).
Alcohol Water
Alcohol Water
Mean
4.3
5.4
Mean
4.3
Variance
1.79
1.6
Variance
1.79
Observations
10
10
Observations
10
Pearson
0.45
Pooled Variance
1.69
Correlation
Hypothesized
Hypothesized
0
Mean Difference
Mean Difference
df
9
df
18
t Stat
-2.47
t Stat
-1.89
Which of the statements below is correct
a. Two sample t-test showed no significant effect of alcohol (t = -2.47, df = 9, p > 0.05)
b. Two sample t-test showed a significant effect of alcohol (t = -1.89, df = 18, p < 0.05)
c. Paired t-test showed a significant effect of alcohol (t = -2.47, df = 9, p <0.05)
d. Paired t-test showed no significant effect of alcohol (t = -1.89, df = 18, p >0.05)
5.4
1.6
10
Transcribed Image Text:To investigate the effect of alcohol on fine motor movements, subjects were asked to thread as many needles as possible during a ten minute period after having consumed (1) 100 ml of colorless, odourless and tasteless 80-proof grain alcohol (alcohol) and (2) 100 ml of distilled water (water), a week apart and counterbalanced. Two t-tests were run (lower part of each table is missing). Alcohol Water Alcohol Water Mean 4.3 5.4 Mean 4.3 Variance 1.79 1.6 Variance 1.79 Observations 10 10 Observations 10 Pearson 0.45 Pooled Variance 1.69 Correlation Hypothesized Hypothesized 0 Mean Difference Mean Difference df 9 df 18 t Stat -2.47 t Stat -1.89 Which of the statements below is correct a. Two sample t-test showed no significant effect of alcohol (t = -2.47, df = 9, p > 0.05) b. Two sample t-test showed a significant effect of alcohol (t = -1.89, df = 18, p < 0.05) c. Paired t-test showed a significant effect of alcohol (t = -2.47, df = 9, p <0.05) d. Paired t-test showed no significant effect of alcohol (t = -1.89, df = 18, p >0.05) 5.4 1.6 10
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