Calculate the critical degrees of freedom and identify the critical t value for a single-sample t test in each of the following situations, using p=.05 for all scenarios. Then, state whether the null hypothesis would be accepted or rejected: |
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10) Two-tailed test, N = 10, t = 2.35 |
df= (answer) |
critical t = (answer) |
Accept or Reject H_{o}: (answer) |
from above given data:
df=n-1=9
crtiical t for 6 degree of freedom and 0.05 level = -2.262 , 2.262
Reject Ho
Calculate the critical degrees of freedom and identify the critical t value for a single-sample t...
9. For each of the following calculated t-values and sample sizes, indicate the degrees of freedom and whether you should reject or not reject the null hypothesis (if you reject Ho, indicate whether it is at the .05 or .01 significance level). Conduct each of these t-tests using a two-tailed hypothesis. a. t = +2.18 ni = 5 n2 = 5 b. t= -2.05 n1 = 12 n2 = 10 c. t = -2.18 n = 15 n2 = 15...
A researcher in interested in whether students who are musicians have higher intelligence test scores than students in the general population. The mean for the general population is 100. The researcher selects musicians from local high schools and gives them an intelligence test, with a mean of 105. SS 725 for the 2. 30 sample Null Hypothesis (Ho): μ State in words: Alternative Hypothesis (Ha): μ > State in words: df= t critical value (with α : .05): One-tailed or...
Find the critical value of t from Appendix D for the following situations. Specify the correct degrees of freedom, whether the value is “+/-“ or is “+ or –“ and the df you used in the table if the value isn’t listed. a) N = 32, α = .05, one-tailed independent groups t-test b) N = 28, α = .01, two-tailed independent groups t-test c) N = 26, α = .05, one-tailed independent groups t-test d) N = 41, α...
Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using Excel. (a-1) Comparison of GPA for randomly chosen college juniors and seniors: x⎯⎯1x1 = 4.75, s1 = .20, n1 = 15, x⎯⎯2x2 = 5.18, s2 = .30, n2 = 15, α = .025, left-tailed test. (Negative values should be indicated by a minus sign. Round down your d.f. answer to the nearest whole number and other answers to 4 decimal places. Do not use "quick"...
Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using Excel. (a-1) Comparison of GPA for randomly chosen college juniors and seniors: x⎯⎯1x1 = 4.75, s1 = .20, n1 = 15, x⎯⎯2x2 = 5.18, s2 = .30, n2 = 15, α = .025, left-tailed test. (Negative values should be indicated by a minus sign. Round down your d.f. answer to the nearest whole number and other answers to 4 decimal places. Do not use "quick"...
Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using Excel. (a-1) Comparison of GPA for randomly chosen college juniors and seniors: x⎯⎯1x1 = 4.75, s1 = .20, n1 = 15, x⎯⎯2x2 = 5.18, s2 = .30, n2 = 15, α = .025, left-tailed test. (Negative values should be indicated by a minus sign. Round down your d.f. answer to the nearest whole number and other answers to 4 decimal places. Do not use "quick"...
Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using Excel. (a-1) Comparison of GPA for randomly chosen college juniors and seniors: x⎯⎯1 = 4, s1 = .20, n1 = 15, x⎯⎯2 = 4.25, s2 = .30, n2 = 15, α = .025, left-tailed test. (Negative values should be indicated by a minus sign. Round down your d.f. answer to the nearest whole number and other answers to 4 decimal places. Do not use "quick"...
Do a two-sample test for equality of means assuming unequal variances. Calculate the p-value using Excel. (a-1) Comparison of GPA for randomly chosen college juniors and seniors: x⎯⎯1 = 4, s1 = .20, n1 = 15, x⎯⎯2 = 4.25, s2 = .30, n2 = 15, α = .025, left-tailed test. (Negative values should be indicated by a minus sign. Round down your d.f. answer to the nearest whole number and other answers to 4 decimal places. Do not use "quick"...
Suppose that, for a t-test, your computed value for t is +3.28. The critical value of t is +2.048. Explain what this means. Do you reject the null hypothesis or not? Now suppose that you have 28 degrees of freedom and are using a two-tailed (nondirectional) test. Draw a simple figure to illustrate the relationship between the critical and the computed values of t for this result.
A repeated-measures study with a sample of n 16 participants produces a mean difference of Mp 4 with a standard deviation of s = 8, Use a two-tailed hypothesis test with a-.05 to determine whether it is likely that this sample came from a population with μο-0. Degrees of Freedom 21 5000 5000 0.0 0.000 3.0 -2.0 1.0 2.0 3.0 AN t-criticalt The results indicate: O Rejection of the null hypothesis; there is a significant mean difference O Failure to...