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[DOC File]Stat 301 Review (Test 2)
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Test Statistic: OR . read SPSS printout. P-value:, use ,, use or, use . Look up P-values on the t-table (df=n-1) OR . read SPSS printout 2-sample t-test Data comes from two independent samples selected from two independent populations or a completely randomized experiment with two factor levels or treatments. Quantitative data
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[DOC File]Example SPSS Output for T-Test for Difference in Means
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T-Test. How to Read this Output: Note the mean for each of the two groups in the “Group Statistics” section. This output shows that the average weight for European cars is 2431 pounds, versus 2221 pounds for Japanese cars. To see the results of the t-test for the difference in the two means, find the p-value for the test.
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[DOC File]Section 1
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Section 11.2: Inference about Two Means: Independent Samples. Objectives: Students will be able to: Test claims regarding the difference of two independent means. Construct and interpret confidence intervals regarding the difference of two independent means. Vocabulary: Welch’s approximate t – the test statistic to compare two independent means
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[DOC File]Estimating the Sample Size Necessary to Have Enough Power
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For 80% power you need, in each of the two groups, 393 scores for small effect, 64 for medium, and 26 for large. Correlated Samples T. The correlated samples t test is mathematically equivalent to a one-sample t test conducted on the difference scores (for each subject, score under one condition less score under the other condition).
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[DOC File]DEFININITIONS, RULES AND THEOREMS
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Test Statistic for Two Means: Independent and Large Samples (p. 439) (1 and (2: If (1 and (2 are not known use s1 and s2 in their places, provided that both samples are large. P-value: Use the computed value of the test statistic z, and find the P-value by following the procedure summarized in …
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[DOC File]Power and Sample Size Calculation
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', then select the design you want to use. (the designs available in that menu include: one-sample t-test, paired t-test, two sample t-test and one-way ANOVA). 8). After you select the design another window pops-up and asks you to input the needed options and parameters. If you need to know the needed sample size for your research, you can select '
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[DOC File]MTH 265 – Statistics for Scientists and Engineers
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large samples. from two binomial populations. Be able to calculate the test statistic, which is a z-value in this case. Be able to compute the P-value and be able to write out the probability statement for the P-value that involves the test statistic. Be able to determine whether or not the null hypothesis should be …
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[DOC File]Sign Test
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Two-Sample t-test. Compares the mean of 2 different samples. Is one group significantly higher than the other? CRITICAL VALUE. Use t-table. For the degrees of freedom in the critical value, use. df = n1 + n2 – 2. Your calculator will also give you the degrees of freedom. TEST STATISTIC. Without a graphing calculator, you would use the formula
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[DOC File]Confidence Intervals and Tests of Hypotheses
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Since the test statistic value is greater than the critical value, is rejected. Hence, there is evidence to support the claim that S.D. is greater than 8. Theorem: If are the variance of independent samples of size and , respectively, from normal populations, then a confidence interval for is
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[DOCX File]Statistical Tests - Loudoun County Public Schools
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24. Click in the box next to Type. If you are doing a paired test, enter 1. If you are doing a t-test in which the two samples have equal variances, you would type a 2. If the two samples have unequal variances, type 3. Our variances are not equal, so type 3.
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Test statistic calculator two samples