Question
Hello, can someone please help me answer these questions? Question 1 We reject H0 for the independent samples t test if the obtained values of
Hello, can someone please help me answer these questions?
Question 1
We reject H0 for the independent samples t test if the obtained values of t
are larger in absolute value than the critical values.
are smaller in absolute value than the critical values.
are the same in absolute value than the critical values.
Question 2
Based on these results, t (92) = -.67, p = .41, d = -.10. The math scores of males (M = 31.54, SD = 5.16, n = 29) on and females were compared (M = 32.46, SD = 4.96, n = 65). What can be concluded based on these results?
Males (M = 31.54, SD = 5.16, n = 29) on average score statistically significantly higher than females (M = 32.46, SD = 4.96, n = 65) in terms of math achievement.
Males (M = 31.54, SD = 5.16, n = 29) on average do not statistically significantly differ from females (M = 32.46, SD = 4.96, n = 65) in terms of math achievement
Males (M = 31.54, SD = 5.16, n = 29) on average score statistically significantly lower than females (M = 32.46, SD = 4.96, n = 65) in terms of math achievement.
Question 3
Based on these results, t(90)= 3.66, p= .04, 2 = .25, what can the educational researcher say about the null hypothesis?
Reject the null hypothesis
Fail to reject the null hypothesis
Question 4
The F (Levene) test on the SPSS output tests for what assumption?
The normality assumption
The homogeneity of variance assumption
The assumption of extreme outliers
Question 5
A researcher reports that the 2 effect size for her study is very large (2 = .64); but the t test that she reports is quite small, and not statistically significant. What inference can you make about this situation?
the researcher has made a mistake: if n2 is this large, then t must be significant
the n's in the groups are probably rather large
the n's in the groups are probably rather small
none of the above
Question 6
The results of a study that used an independent samples t test was t(28) = 2.14, p = .01. Based on these results, what was the sample size?
30
28
32
Question 7
A test of Emotional Intelligence (EI) was given to 241 women and 89 men. The results were as follows: for women, M = 96.62, SD = 10.34; for men, M = 89.33, SD = 11.61, t(328) = -5.48, p < .001, two tailed. What do these results mean?
There was a statistically significant difference, women have higher emotional intelligence than men.
There was a statistically significant difference, men have higher emotional intelligence then women
There was no statistically significant difference, women and men have similar emotional intelligence.
Question 8
Based on these results, t(90)= 1.87, p= .07, n2 = .13, what can the educational researcher say about the null hypothesis?
Reject the null hypothesis
Fail to reject the null hypothesis
Question 9
An independent-samples t test is appropriate for measuring differences between two group means.
True
False
Question 10
In most educational research, if p < .05 then you should:
Reject the null
Fail to reject the null
Question 11
Suppose you read the following in a journal. The group means did not differ significantly, t(30.1) = 1.68, p > .05, two tailed. You notice that the n's in the groups were Grp1 (n = 40) and Grp2 (n = 55). What degrees of freedom would you normally expect?
92
54
55
93
Question 12
When conducting an independent samples t test, the assumption for Normality is tested using:
Shapiro-Wilks or Kolmogorov-Smirnov
Levene
Wilks Lambda
Cronbach's Alpha
Question 13
A researcher plans to do a study to see whether people who eat an all carbohydrate meal have different scores on a mood scale than people who eat an all protein meal. Thus, the manipulated independent variable is the type of meal (1 = carbohydrate, 2 = protein). What analysis would be the best choice to analyze the data?
independent samples t test
one sample t test
paired samples t test
Question 14
If variances are unequal, which would be an alternate non-parametric test for the independent samples t test:
Wilcoxon rank sum test
Kruskal-Wallis test
Shapiro-Wilks
Kolmogorov-Smirnov
Question 15
Which of the following is not a measure of effect size used for an independent-samples t test:
2
Cohens d
rpb
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