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Mathematical and Statistical Applications For Breath Test ...
Determine the Difference (RCV) that would be considered significant at the two-tailed critical value of α = 0.05. Now we want to compare these results to those of question 23. As in question 23, assume we have measured an individual’s blood alcohol concentration by gas chromatography in duplicate with results of 0.128/0.129 g/100ml.

[DOCX File]Hypothesis Testing - UH
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A statistically significant difference" simply means there is statistical evidence to say that there is a difference; It does not mean the difference is necessarily large, important, or significant in the common meaning of the word. For Discussion.

[DOC File]Math 305/505 – STATISTICAL METHODS
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The 95% confidence interval for the difference in means is [0.272, 0.808]. Therefore, we are 95% confident that mu1-mu2 is between 0.272 and 0.808. Conclusion. Because the p-value is < alpha, therefore, we found enough evidence to conclude that there is a statistically significant difference in potency.

[DOC File]M&M Statistics
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If however, the probability of getting the observed deviation from the expected results by chance is less than 0.05 (5%) then we should reject the null hypothesis. In other words, for our study, there is a significant difference in M&M color ratios between actual store-bought bags of M&Ms and what the Mars Co. claims are the actual ratios.

[DOC File]WRITING UP POWER ANALYSES
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There was no significant difference between the mean. biases of experts and novices, t(78) = -.149, p = .882, Cohen’s d = 0.03. Power analysis revealed. that in order for an effect of this size to be detected (80% chance) as significant at the 5% level, a sample of 34886 participants would be required. This is quite clear and interpretable.

[DOC File]Quick Tips to Identifying High Quality Research
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Statistical significance AND clinical significance. In brief, statistical significance means that there is a real relationship involved in whatever it is the researchers measured. For example, people who get counseling really are less depressed than those who do not. But, you have to ask is the difference “clinically significant”?

[DOC File]Test of Hypothesis Examples Error Type I and Type II
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Ha: There's is a significant difference in the average height of the trees. (from 2 sites) Type I Error: We fail to reject Ho and state that there's no significant difference between the average height of pine trees in the 2 sites in the Everglades; when in fact there is.

[DOC File]Differences Between Statistical Software ( SAS, SPSS, and ...
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Our goal here is to test if there is a significant difference between test and reference drugs on plasma levels of ciprofloxacin at different times. The binary response variable is “Drug”, and the times 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 6.0, and 8.0 are the predictors.

[DOC File]Data Screening Check List
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Reaching a significant value (p < .05) on the Levene’s test means that you have heterogeneity of variance, but the test is very conservative. So you either should increase the alpha level to .001 for the test or better yet apply the F-Max test.

[DOC File]One Sample T-Test
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In order to find the power needed at an alpha level of .05 to detect a statistically significant difference in mean exit time for our two samples of mice with an effect size of .66, we enter the difference of means (.415), and the standard deviations of .63 (remember, .415/.63 = .66), and the sample sizes of 30 in the dialog box by clicking the ...

[DOC File]Worksheet for Critical Appraisal of Experimental Design Study
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A statistically significant difference was found between the two groups in mean weight change at four months, the end of the psychoeducation classes, (p=.005) and 6 months, the end of the study, (p=.0007): the intervention group had a mean weight gain of .81 lbs at 4 months, compared to the standard care group’s 7.17 lbs at 4 months, and at 6 ...

[DOC File]A researcher is interested in determining student’s ...
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a. There is no significant change (difference) in performance when students have received different amounts of tutoring. b. As students (incrementally) receive more tutoring (i.e., from one to two to three to four sessions), their performance (score) significantly improves (increases). c.

[DOC File]Power and Sample Size Calculation
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However, researchers are also faced with the decision to make a difference between statistical difference and scientific difference. Although a larger sample size enables researchers to find smaller difference statistically significant, that difference may not be large enough be scientifically meaningful.

Find statistical significant difference