Term
| What are two general research strageies that can be used to obtain the two sets of data compared? |
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Definition
- The two sets of data could come from two completely separate groups. Which also known as the independent-measures or a between study.
- The two sets of data could come from the same group of participants. Also known as repeated measures/within-subjects
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Term
| What is a independent-measures? |
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Definition
| When the research strategy invovles two separate groups of samples. |
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Term
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Definition
| It is the same as an Independant study that invovles two seperate groups |
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Term
| What does hypothesis test? |
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Definition
| Allows researchers to use the data from two separate samples to evaluate the mean difference between two populations or between two treatment conditions. |
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Term
| What is repeated-measures? |
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Definition
| The two sets of data could come from the same group of participants. |
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Term
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Definition
| It is the same as repeated-measures. The two sets of data could come from the same group of participants. |
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Term
| In a independent-measure study what symbol would be used for the number of scores in the first sample? |
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Definition
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Term
| In a independent-measure study what symbol would be used for the number of scores in the second sample? |
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Definition
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Term
| In a independent-measure study what symbol for the sample mean. |
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Definition
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Term
| In a independent-measure study what symbol would be sums of squares? |
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Definition
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Term
| What is the goal of the idependent-measures research study? |
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Definition
| To evaluate the mean difference to evaluate the difference between two populations (or between two treatment conditions). |
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Term
| What is the symbol for the mean population and subscipt. |
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Definition
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Term
| What are the two formats of u1 - u2? |
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Definition
| H0: = 0 (no differnce between the population means?) |
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Term
| The symbol for the standard error for the sample mean difrrerence is represented by what? |
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Definition
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Term
| What does a standard error generally measure? |
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Definition
| how accurately a statistic represnts a parameter |
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Term
| What is the null hypotheses for an independent-measure test? |
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Definition
Ho: μ1 - μ2 = 0 or μ1 = μ2
(There is no difference between the population means) |
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Term
| What is the alternative hypotheses for an independent-measure test? |
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Definition
H1: μ1 - μ2 ≠ 0 or μ1 ≠ μ2
(There is a mean difference)
this can also can be stated as
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Term
| What is the basic stucture of the (t) formula for both the independent measures and the single sample hyopothesis test? |
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Definition
t = sample statistic - hypothesized population mean
estimated standard error
t = M-u
sm |
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Term
| Basically what does the independent measures (t) do? |
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Definition
| a two sample (t) that doubles all the elements of the single sample (t) formulas |
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Term
| What is the formula for a two sample (t) hypothesis test? |
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Definition
t = (M1 - M2) - (μ1 - μ2)
s(M1 - M2)
t = sample mean difference - population mean differance
estimated standard error |
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Term
| The mean difference independent measure hypothesis test should alway equal what? |
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Definition
μ1 - μ2 = 0
Therefore the (t) cans simple be written as follows:
t = (M1 - M2)
s(M1 - M2)
t = sample mean difference
estimated standare error |
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Term
| In the (t) formulas for hypothesis what symbol represents the standard error. |
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Definition
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Term
| In the (t) formulas for hypothesis what symbol represents the sample mean difference. |
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Definition
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Term
| In the (t) formulas for hypothesis what symbol represents the mean difference. |
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Definition
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Term
| In general what does a standard error measure? |
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Definition
| How accurately a statstic represents a parameter. |
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Term
What is a form of a standard error.
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Definition
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Term
| What is the symbol for a M standard error? |
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Definition
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Term
| What is the symbol for pool variance? |
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Definition
sp2 = SS1 + SS2
df1 + df2 |
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Term
| What is the formula for Cohen's d |
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Definition
d = estimated mean difference
estimated standard deviation
d = μ1 - μ2
σ |
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Term
| What is the formula for Cohen's d when it becomes estimated using sample sizes |
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Definition
estimated d = estimated mean difference
estimated stadard deviation
estimated d = M1-M2
√sp2 |
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Term
| What is the formula for r2? |
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Definition
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