(a) Show that the significant value of t at level of significance a for one-tailed test is equal to that of t at 2a significance level for two-tailed test.

Q: n building an arena, steel bars with a mean ultimate tensile strength of 400 Megapascal (MPa) with a…

A: Provided data is, steel bars with a mean ultimate tensile strength of 400 Megapascal (MPa) with a…

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Q: What are the assumptions of the independent-samples t test?

A: The significant assumptions for the independent samples t-test would be as follows:

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A: Given : significance level , α = 0.05  sample size , n = 22  Hypothesis test is a right tailed test

Q: In building an arena , steel bars with a mean ultimate tensile strength of 400 Megapascal (MPa )…

A: In building an arena , steel bars with a mean ultimate tensile strength of 400 Megapascal (MPa )…

Q: a. Is there a significant difference in reported pain between the two conditions? Use a two-tailed…

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Q: When performing a two-sample t-test, if the variance in the two groups being compared are considered…

A: 2 sample test is used to compare the means of 2 samples. t-test is a parametric test.

Q: What is the critical value for an upper‐tailed hypothesis test of the population mean when the…

A:

Q: a. Is there a significant difference in reported performance between the two conditions? Use a…

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Q: 4. Describe the homogeneity of variance assumption and explain why it is inportant for the…

A: Homogeneity of variance states that the variance in each group should be equal (or homogeneous).…

Q: 2. In an ANOVA, when would the F-test statistic be zero? A) When there is no difference in the…

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Q: To test whether the final test scores for a class are significantly higher than their first test…

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Q: If homogeneity of variance is violated for a correlated-groups t-test, what nonparametric test…

A: Introduction: A correlated-groups t-test, also known as the paired t-test, is used to compare…

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Q: Out of an F test, Chi-squared t test, Two sample t test, and an One sample t test, the best test to…

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Q: t-Test: One-Sample   Mean (rating) 2.88 Variance 2.41 Observations 15 t-statistic -0.30 P(t = T)…

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Q: Perform the test of hypothesis on the following scenarios. In building an arena, steel bars with a…

A: Solution: Given data Mean (μ) = 400 Mpa Variance = 81 Therefore,  Standard deviation:  = √variance…

Q: sed on a two-tailed t-test,what will be the conclusion of the significance test for this correlation…

A: From there results of first question, the correlation value is 0.97.

Q: (b) Suppose that the test for equal variances in (a) concludes that the two populations have…

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Q: An analysis of variance differs from a t test for independent means in that an analysis of variance…

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Q: if variances are unequal, which would be an alternate non-parametric test for the independent…

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Q: denominator of the t score formula for the independent-samples t-test is ______.

A: Given that  The denominator of the t score formula for the independent-samples t-test   We know that…

Q: In building an arena, steel bars with a mean ultimate tensile strength of 400 Megapascal (MPa) with…

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Q: what is the general alternative hypothesis for a two tailed independent samples t test

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Q: A t-test would reject the null hypothesis at a 0.05 significance level. True or False?

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Q: In building an arena, steel bars with mean ultimate tensile strength of 400 megapascal(Mpa) with a…

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A: Level of significance = 0.05

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Q: 13. What is the correct decision in a hypothesis if the data produce a t-statistic that is in the…

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Q: Do adults (age 20–45) with children and adults without children have the same distribution of type…

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Q: At a .05 “alpha level”, what is the “critical cutoff” z-score for a “two-tailed test”?

A: The critical value is zα/2.

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A: Given Solution:

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