.01, or .001 levels, meaning that there will be a margin of error of 5%, 1%, or .1%. For a two-tailed test, divide the value of alpha by 2 and compare it with the Z-statistic if the standard deviation is
Two-Tailed Test One-Tailed Test Select Alpha Level: .05 .01 Number of Rows: [10] [30] [50] [100] [250] Group A Group BDescriptive Statistics MeanStandard Deviationn Group A 0 0 0 Group B 0 0 0 Independent Samples t-Test t-Statistic 0Result Degrees of Freedom 0 Critical...
For a one-tailed test, if the df is 11 and the computed t value is 0.85, how is the p-value represented? For a two-tailed test, if the df is 6 and the computed t value is 30.76, how is the p-value represented? Find the...
Hypotheses 1) are called two-tailed tests Hypotheses 2) and 3) are called one-tailed tests Formula of unpaired two-samples t-test Classical t-test: If the variance of the two groups are equivalent (homoscedasticity), the t-test value, comparing the two samples (AA and BB), can be cal...
Answer to: Using the z-table, find the critical value for a two-tailed test with alpha = 0.05. By signing up, you'll get thousands of step-by-step...
How to use the f test calculator? Choose the tails:The one-tailed test, left or right, is more powerful than the two-tailed test and results in a smaller p-value. You should choose it if only one direction is interesting, but the question of when to use the one-tailed test is contr...
Advanced significance & confidence interval calculator. Comments that one-tailed tests“do nothing to add value”versus two-tailed tests demonstrate ignorance about the possibility of type III errors and of the connection between a research hypothesis and a statistical hypothesis, and can only be under...
For a two-tailed test where α=0.05, Z is always equal to: a. 1.96 b. +1.96 c. ± 1.96 d. ± 1.645 Normal Distribution: In the context of statistics, a normal distribution pattern is the one where the value of mean, median and mode ...
Is this test right-, left-, or two-tailed? What is the p-value? Do you reject or not reject the null hypothesis? Show Answer try it 2 A study is done to determine if Company A retains its workers longer than Company B. Company A samples 15 workers, and their average ...
Properties of the two sample t-test The main properties of a two sample t-test for two population means are: Depending on our knowledge about the "no effect" situation, the t-test can be two-tailed, left-tailed or right-tailed