Question
Conduct a 2-tailed Hypothesis Test State your hypothesis in words and symbols Critical value Summarize data into appropriate test statistic Evaluate and interpret the null
Conduct a 2-tailed Hypothesis Test
State your hypothesis in words and symbols
Critical value
Summarize data into appropriate test statistic
Evaluate and interpret the null hypothesis.
Compute the 95% Confidence Interval SPSS output, what were the mean difference the standard error and critical values Interpret your confidence interval.
If you Changed your Critical Value to = 0.01
What would your new critical value be.
Would this change your decision about your null hypothesis.
Compute the Effect Size and PowerOutput(s) from G*Power (or SamplePower). --Overlapping distributions --Data Box ___ Discuss your findings and interpret Power. Is your Power value accurate? Why or why not.
Explain why you obtained your results. Were your results expected? Address relevant concerns
Group Statistics | |||||||||||
Membership Status of Subjects | N | Mean | Std. Deviation | Std. Error Mean | |||||||
Grade point average | Sorority member | 9 | 3.5833 | .43986 | .14662 | ||||||
non-member | 9 | 3.1700 | .69744 | .23248 | |||||||
Independent Samples Effect Sizes | |||||||||||
Standardizer | Point Estimate | 95% Confidence Interval | |||||||||
Lower | Upper | ||||||||||
Grade point average | Cohen's d | .58305 | .709 | -.257 | 1.654 | ||||||
Hedges' correction | .61229 | .675 | -.245 | 1.575 | |||||||
Glass's delta | .69744 | .593 | -.391 | 1.543 | |||||||
a. The denominator used in estimating the effect sizes. Cohen's d uses the pooled standard deviation. Hedges' correction uses the pooled standard deviation, plus a correction factor. Glass's delta uses the sample standard deviation of the control group. | |||||||||||
Independent Samples Test | |||||||||||
Levene's Test for Equality of Variances | t-test for Equality of Means | ||||||||||
F | Sig. | t | df | Significance | Mean Difference | Std. Error Difference | 95% Confidence Interval of the Difference | ||||
One-Sided p | Two-Sided p | Lower | Upper | ||||||||
Grade point average | Equal variances assumed | 8.246 | .011 | 1.504 | 16 | .076 | .152 | .41333 | .27485 | -.16933 | .99600 |
Equal variances not assumed | 1.504 | 13.495 | .078 | .156 | .41333 | .27485 | -.17825 | 1.00491 |
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