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 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, η2 = .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 η2 effect size for her study is very large (η2 = .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:

    η2

    Cohen’s d

    rpb

 

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