A. What is df = for this t-test?B: Do a t-test with alpha = 0.05 two-tailed. Is the result significant?C: What is the value of Cohen's d for this experiment? **Data Comparison Between Group A and Group B**The table below compares data collected from Group A and Group B.| Group A | Group B ||---------|---------|| 12 | 10 || 10 | 9 || 7 | 4 || 7 | 3 || 8 | 5 || 5 | 4 |**Explanation of the Table:**This table lists values measured for two distinct groups, Group A and Group B. Each row represents a paired set of data points, where the first value is from Group A and the second value is from Group B. For example, in the first row, Group A has a value of 12, while Group B has a value of 10. This type of data is often used to compare performance, outcomes, or other metrics between two groups in an experimental or observational study.**Analysis:**- **General Trend:** Group A shows higher values compared to Group B in most of the data points.- **Highest Values:** The highest value recorded in Group A is 12, while in Group B it is 10.- **Lowest Values:** The lowest value recorded in Group A is 5, while in Group B it is 3.- **Similar Values:** Both groups have the same value of 4 in one instance.Use this data to identify trends, make comparisons, and draw conclusions about the performance or behavior of the two groups.

Answered: Image /qna-images/answer/8721bc19-0c88-40b7-90a6-7cbac1ab7e1d.jpg

Answered: What is df = for this t-test? B: Do a…

What is df = for this t-test? B: Do a t-test with alpha = 0.05 two-tailed. Is the result significant? C: What is the value of Cohen's d for this experiment?

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

A sample of difference scores from a repeated-measures experiment has a mean of MD = 5 with a variance of s 2 = 64. If the sample size is n = 4, and you had rejected the null hypothesis, which of the following best describes the effect size using estimated d? low medium high
You are more likely to make a type 1 error with a sample of n=4 than with a sample of n=100 if you use α= .05 for both tests. A. True B. False
You obtain a t comp of .975 in a two sample independent t test with alpha at .05. Is it significant?
An analysis of variance is used to evaluate the mean differences for a research study comparing four treatments with a separate sample of n = 8 in each treatment. If the data produce an F-ratio of F = 5.50, then which statistical decision is correct? a. Reject the null hypothesis with α = .05 but not with α = .01. b. Reject the null hypothesis with either α = .05 or α = .01. c. Fail to reject the null hypothesis with either α = .05 or α = .01. d. There is not enough information to make a statistical decision.
State the Result: A hypothesis test was conducted at the alpha = 0.01 level of significance. The test resulted in a p-value of 0.044.
Under what circumstances is a t statistic used instead of a z-score for a hypothesis test? Justin wants to know whether a commonly prescribed drug does improve the attention span of students with attention deficit disorder (ADD). He knows that the mean attention span for students with ADD who are not taking the drug is 2.3 minutes long. His sample of 12 students taking the drug yielded a mean of 4.6 minutes. Justin can find no information regarding σx , so he calculated s2x =1.96. Determine the critical region using a one-tailed test with alpha = .05. Conduct the hypothesis test (Do the math and compare the t-critical and t-obtained values). State your conclusions in terms of H0 (Should you reject the H0 or fail to reject/accept the H0). Based on your analysis, is there a relationship between the drug and attention span?
A sample of difference scores from a repeated-measures experiment has a mean of MD = 5 with a variance of s 2 = 64. If the sample size is n = 4, what is the correct decision if using a two-tailed test with alpha = .05? A. Accept the null hypothesis, there is a significant mean difference. B. Accept the null hypothesis, there is not a significant mean difference. C. Reject the null hypothesis, there is a significant mean difference. D. Reject the null hypothesis, there is not a significant mean difference.
Suppose that we have a problem for which the null and alternative hypothesis are given by: H0: μ = $1250. H1:μ ≠ $ 1250 Is this a right-tailed test, left-tailed test, or two-tailed test. Find the z value based on a level of significance of α=.12.
Suppose that we have a problem for which the null and alternative hypothesis are given by: H0: μ = 890. H1:μ ≠ 890. Is this a right-tailed test, left-tailed test, or two-tailed test. Find the z value based on a level of significance of α=.09.
A researcher conducts a one-way ANOVA and obtains a p value of .02 (when alpha = .05). What can you conclude? a.The researcher rejects the null hypothesis in favor of an alternative hypothesis. b. The research made a Type I error. c. either A or B d. neither A nor B