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- A researcher obtained a result of t(9)=1.22, p>.05 for their study using a one sample t-test. Are the results significant using an alpha level of .05 and how many participants were in the group?An independent-measures study comparing two treatment conditions with n = 6 in each sample produces t = 4.00. What is the value of r2 for this study?A researcher obtains M = 45 with SS = 250 for a sample of n = 10 women and M = 49 with SS = 270 for a sample of n = 10 men. If the two samples are used to evaluate the mean difference between the two populations, what value will be obtained for the t statistic?
- A sample of 270 items was selected. Compute the p-value and state your conclusion for each of the following sample results. Use ? = 0.05.In a test of H0: p = .43 versus Ha: p ≠ .43, a sample of size 1500 leads to a p-value of 0.087. Which of the following must be true if a = 0.05? A. The Ho should be rejected at the 5% level B. The Ho should fail to be rejected at the 5% level C. The Ho should be accepted at the 5% levelA random sample of n = 16 scores is obtained from a population with a mean of μ = 80, and a treatment is administered to the sample. After treatment, the sample mean is found to be M = 82. Assuming the sample variance is s 2 = 1600, what is the estimated d?
- For the population with a mean of 50 and a standard devitation of 8, find the z-score and standard error corresponding to a sample mean of M=46 for n=16.A sample of n = 20 scores is transformed in to z-scores. The mean for the 20 z-scores is ____? If a researcher reports t(18) = 1.30, p > .05 for a two-sample independent-measures experiment, the results were significant. T or F?An independent-measures study is analyzed using the appropriate t-test, and the APA summary is t(56) = 3.19, p < .01, d = 0.32. If the two samples were equal in size (n1 = n2), how many people were in each sample?
