A researcher obtains a t statistic of t = 4.50 from a repeated measures study using n = 25 participants. Determine the effect size using r2
A researcher obtains a t statistic of t = 4.50 from a repeated measures study using...
A researcher obtains t = 2.25 for a repeated-measures study using a sample of n = 10 participants. Based on this t value, what is the correct decision for a two-tailed test? Reject the null hypothesis with a -.05 Reject the null hypothesis with a -01 Fail to reject the null hypothesis with a - .05 Cannot determine without additional information
A researcher conducted a repeated-measures t-test with the SampleA mean equaling 10 (n = 10), the SampleB mean equaling 18 (n = 10), a significant t value of 3.00, and a standard deviation of 1.5. What is the effect size using r2
3. Repeated-measures and matched-subjects experiments Aa Aa Repeated-measures experiments measure the same set of research participants two or more times, while matched-subjects experiments study participants who are matched on one or more characteristics. Which of the following are true for both a repeated-measures experiment and a matched-subjects experiment when used to compare two treatment conditions? Check all that apply. The researcher computes difference scores to compute a t statistic. □ If the researcher has n number of participants to use...
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A researcher obtains a sample of n = 25 students and measures each individual's reading performance two times: before and after implementation of a new special reading program. The data will be used to estimate the mean amount of improvement. Which equation should the researcher use? O A. the single-sample t equation B. the independent-measures t equation c. the repeated-measures t equation D. cannot determine without additional information
7. Assumptions underlying the repeated-measures t test Suppose a sleep researcher wonders whether playing classical music while getting ready for bed helps people fall asleep faster. She has 20 study participants sleep two nights in the sleep lab. For one of those nights, the researcher has each study participant listen to classical music for 15 minutes before getting into bed. For the other night (the control night), the room is quiet. (The researcher varies which night the study participants listen to...
Two samples, each with n = 9 scores, produce an independent-measures t statistic of t = 3.00. If the effect size is measured using rẽ, what is the value of r2? 4/20 9/25 O2/16 2/18
True or False 4. The formula used in repeated-measures t statistic Is used with a matched-subjects design even though the design uses two separate samples. .One advantage of a repeated-measures design is that it typically requires owa nts than an independent-measures design. When computing difference scores' (D values) the sign of the difference(+or-'s not nt. You need to record only the size of the difference. Power is 14. To get a big effect size, you should increase N. Power analysis...
Using an independent samples t-test a researcher obtains a t-statistic of 2.316, he rejects the null at the 2 tailed alpha level of 0.05. Estimate N1+N2 (Total N, Total number of subjects): less than 8 8 or more 10 or more less than 10 7 or more
Using an independent samples t-test a researcher obtains a t-statistic of 2.316, he rejects the null at the 2 tailed alpha level of 0.05. Estimate N1-N2 (Total N, Total number of subjects): less than 8 8 or more 10 or more less than 10 7 or more
Using an independent samples t-test a researcher obtains a t-statistic of 2.316, he rejects the null at the 2 tailed alpha level of 0.05. Estimate N1+N2 (Total N, Total number of subjects): less than 8 8 or more 10 or more less than 10 7 or more