If we compared two groups of 15 on a math achievement test, what would be the value of t that would have to be exceeded in order for the difference to be significant (p<.05, two –tailed test )
From the given information,
Degrees of freedom= 30-2 = 28
Alpha= 0.05
Hence by using calculator,
The required correct answer is,
Value of t= 2.0484
Thank you.
If we compared two groups of 15 on a math achievement test, what would be the...
The math achievements scores of two groups, each with 20 students, were compared. The degrees of freedom for the t-test would be: 40 18 42 38 As part of a study of the effect of zombie shows on the walking style of adolescents, researchers measured the gait of 100 subjects (using the ZombieTron 6000) before and after watching a 6 hour Walking Dead marathon. They wanted to see if the adolescents incorporated more “zombie” elements into their gait after this...
Who misses work more often at the ABC Company? Smokers or non-smokers? Test at .05 significance level. (3 Part Question) Summary statistics are: Smokers: Average number of days absent = 14.7; standard deviation = 5.0; n = 44 Non-Smokers: Average number of days absent = 8.3; standard deviation = 4.0; n = 60 A) Suppose you want to do a 2-tailed test. What's the critical value and region of rejection? Z = 1.96 Z = 1.645 Z > 1.96 or...
QUESTION 20 How would we report the following results of a t-test? One-Sample Test Test Value = 7 95% Confidence interval of the Mean Difference Sig (2-tailed) Difference Lower Upper Digitspan 2 364 68 021 542029 8 457 9.9949 t(68) = 2.364, p = .021 t(67) = 2.364, p = .021 t(68) = 5.42, p = .021 t(68) = .021, p = 2.364 QUESTION 21 Fill in the missing numbers in the ANOVA table below: ANOVA Source of Variation S...
QUESTION 15 The critical value for a 2-tailed independent t-test with two groups of 15 people (alpha .01) is: +/- 1.960 +/- 2.763 +/- 2.101 +/- 2.878
An Independent Samples T Test is used to make an inference about whether two groups in the population have different averages on some quantitative measure or dependent variable. This test could be used to compare the average annual earnings of High School graduates, compared to Community College graduates For this potential research question, answer the following questions. Please use only numeric values in your answers to questions 1, 2 and 3 and a word to answer question 4 1) According...
An Independent Samples T Test is used to make an inference about whether two groups in the population have different averages on some quantitative measure or dependent variable. This test could be used to compare the average annual earnings of High School graduates, compared to Community College graduates For this potential research question, answer the following questions. Please use only numeric values in your answers to questions 1, 2 and 3 and a word to answer question 4 1) According...
How does a two-tailed test compared to a one-tailed test when given a sample statistic and a fixed alpha level? A. The critical value to be compared to the statistic would be less extreme with a two-tailed test. B. The critical value to be compared to the statistic would be more extreme with a two-tailed test. C. The total significance area in the comparison distribution is larger in a two-tailed test. D. The total significance area in the comparison distribution...
What is the dependent t-test score for these two group? Is there a sig. diff. between these two groups at alpha.05 (two-tailed) Alternative hypothesis (H1), degrees of freedom, T-crit, and interpretation of results (conclusion) *Determine the EFFECT SIZE* and give the intepretation. USE THE AVG. of the TWO STD. DEV Subjects Group 1 Group 2 2 2 10
What is the dependent t-test score for these two group? Is there a sig. diff. between these two groups at alpha.05 (two-tailed)...
Two samples of n = 5 subjects were analyzed with an independent-samples t-test, producing a t = 2.295. a) What is the tcrit ? b) Does this indicate a significant difference in a two-tailed test with α = .05?
Two samples of n = 5 subjects were analyzed with an independent-samples t-test, producing a t = 2.295. a) What is the tcrit ? b) Does this indicate a significant difference in a two-tailed test with α = .05?