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AGEE 644 Class 8 T-Test
Fichas del conjunto (26)
- 1This test divides the observed difference between the means by the difference expected through chance alonet test for independent samples
- 2If the t ratio is equal to ___ or less, the observed difference between the means is likely due to chance1
- 3________ is the number of observations free to vary around a constant parameter.Degrees of freedom (df)
- 4The degrees of freedom for the t test for independent means is (formula)n1 + n2 -2
- 5Each degree of freedom has its own probability distribution, called a ______t curve
- 6As the degrees of freedom _______, the t curve distribution becomes more like the normal curve.Increase
- 7To report an effect size for an independent t test, calculate Cohen's d and then multiply it by the square root of the _________Sample size
- 8In an ________ sample, each member is chosen randomly from the population, and the composition of one group has no bearing on the composition of the other group.Independent
- 9In a _________ sample, subjects are matched on some qualities, or they may be used under two different experimental conditions.Dependent
- 10The _______________ is also known as the correlated, matched, or paired t test.t test for dependent samples
- 11The _____ tells you that the observed difference is (t) times as great as the difference that would be expected under a true null hypothesis.t ratio
- 12The number of degrees of freedom for the dependent t test is (formula)N-1
N is pairs of observations - 13T test can be used to test hypotheses concerning a population correlation rho. The investigator would find the _________Pearson r
- 14With the Pearson r, the degrees of freedom are (formula)N-2
(N= number of pairs) - 15What is the null hypothesis for a t test?H0=u1=u2
- 16What is the research hypothesis for a t-test?HA= u1<>u2
- 17What are three assumptions of the t-test? The distribution of observations in both populations are ___________. The variances of the observations in population 1 and 2 are _________. The sample of observations from population 1 are _______ of the sample observations from population 2.1. normal
2. equal
3. independent - 18The violation of the assumption of normality has ________ practical consequences in using the t-testminor
- 19The probability of a ____________ is virtually unaffected by marked non-normality with a t testType II Error
- 20When H0 is rejected, but H0 is actually trueType 1 error
Probability = a - 21When H0 is accepted, but HO is falseType II Error
Probability = B - 22What is the formula for a t test?m1-m2/SDm1-m2
- 23Study Effect size equation for independent t test..Page 3 of t-test notes
- 24Paired members will each regress toward the ______ when retestedmean
- 25Study effect size for dependent t-testPage 5 of t test notes
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- AGEE 644 Fichas sobre AGEE 644 Class 8 T-Test, creado por Renee Conneway el 16/04/2018.
- Creado por
- Renee Conneway
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