## EDUC 812 Quiz Independent Samples

**EDUC 812 Quiz Independent Samples t-test **

- The results of a study that used an independent samples
*t-*test was*t*(30) = 2.14,*p*= .01. Based on these results, what was the sample size? - Typically, researchers do not want power below 80%.
- In most educational research, if
*p*< .05 then you should: - For an Independent t-test, the independent variable is __________.
- Based on these results,
*t(2*0) = 2.03,*p =*.06,*2**=*.13, what can the educational researcher say about the null hypothesis? - Interpret the effect size for the following:
*t(*90)= 4.06,*p <*.001, .265 - If the absolute value of a
*t-*statistic is greater than*t-*critical then you should: - When using an independent samples
*t*-test, the author of a journal article reported that*t*(30) = 3.60,*p*< .05. Should the researcher reject the null or fail to reject the null? - A researcher plans to do a study to see whether students who exercise every day have different blood pressure as compared to blood pressure of students who are in the general population. Thus, the independent variable is exercise and the dependent variable is blood pressure. What analysis would be the best choice to analyze the data?
- Based on these results,
*t(60*)= 1.76,*p =*.50, η*2 = .*013 , what can the educational researcher say about the null hypothesis? - Eta square can be calculated using the formula η2 =
*t*2/(*t*2 +*df*). - Based on these results,
*t(4*0)= 1.59,*p =*.24, η*2**= .*010, what can the educational researcher say about the null hypothesis? - Which of the following is not a measure of effect size used for an independent samples
*t-*test? - When looking for extreme outliers using a box and whisker plot, the extreme outliers will have an asterisk (*) next to the data point.
- Based on these results,
*t(98*)= 3.26,*p =*.02, η*2 = .176*, what can the educational researcher say about the null hypothesis? - The independent-samples t-test is used to determine if there is a difference between the means of two unrelated groups on the same continuous dependent variable.
- A researcher plans to do a study to see whether teachers who eat an all carbohydrate diet have different cholesterol levels than teachers in the general public. The dependent variable in this study is:
- A researcher plans to do a study to see whether student athletes who eat an all carbohydrate meal have different scores on a mood scale than student athletes who eat an all protein meal. Thus, the manipulated independent variable is the type of meal (1 = carbohydrate, 2 = protein). What analysis would be the best choice to analyze the data?
- An independent samples t-test is appropriate for measuring differences between a selected sample and a population with a mean that is already known.
- Interpret the effect size (η2) for the following:
*t*(30) = 1.12,*p*= .34, η2 = .002 - The independent-samples t test can only be used if the dependent variable is categorical.
- The Levene’s test tests for what assumption?
- If the alpha level is .05, then the condence level is:
- A journal article reports,
*t*(92) = -1.67,*p*= .11, the reading scores of males (*M*= 31.54,*SD*= 5.16,*n*= 29) and females were compared (*M*= 32.46,*SD*= 4.96,*n*= 65). What can be concluded based on these results? - When conducting an independent samples t-test, the assumption for Normality is tested using: