Follow the steps to calculate the Independent t-test and conduct a 2-tailed test with a = .05.Step 1: State both hypotheses (H statements):Ho: HA = HB%3DH, :XA XgHo: HA = HgH : XA XBO Ho: A = BH: A BStep 2: State your level of risk:3..50.05.01.102.Question 12Step 3: What test statistic will you solve for?Homogeneous t-testPearson's t-testIndependent t-testDependent t-test

Answered: Image /qna-images/answer/2232002e-a99c-40ea-9864-9d2138261448.jpg

Answered: Follow the steps to calculate the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A researcher administers a treatment to a sample from a population with a mean of m=50. If the treatment is expected to increase scores and a one-tailed test is used to evaluate the treatment effect, the the null hypothesis states that m=40. True or false?
The NAEP considers that a national average of 283 is an acceptable performance. Using α = .05, run a two-tail t-test for one sample to test Ho: µ=283 for the 2019 scores. Report the t-obt, df, and p-values. Would you reject the null hypothesis that the 2019 scores come from a population with average 283? If this is the case, does it come from a population from larger or smaller average?
A researcher first decided to conduct a two-tailed hypothesis test, with alpha = .05, but then decided she wants to reduce the risk of a Type I error. What should she do? a. Calculate her statistics more carefully. b. Decrease alpha to .01 c. Increase alpha to .15 e. Conduct a three-tailed test
For the problem below-Use .05 2-tailed alpha level. State null and alternative hypotheses. Report results of statistical test. Given your conclusion, what type of error might you be making? Report Cohen’s d value and interpret
To evaluate the effect of a treatment, a sample is obtained from a population with a mean of μ = 25, and the treatment is administered to the individuals in the sample. After treatment, the sample mean is found to be M= 27.4 with SS = 64. If the sample consists of 9 individuals, what is the t statistic, and are the data sufficient to conclude that the treatment has a significant effect using a two-tailed test with α = .05?
A researcher who wants to know whether the proportion of male births in a hospital is different from the established baseline of 51.07%, would like to test the following hypotheses: Ho:P = 0.51 vs. Ha :P = does not equal 0.51 a) Is the alternative hypothesis upper tail, lower tail, or two tailed? b) What do you conclude if the test results p-value of 0.03 at alpha value = 5% c) What do you conclude if the test results p-value of 0.08 at alpha value = 10%
The following data are from a research study comparing two treatment conditions. Do the data indicate a significant difference between treatments? Use a two-tailed test with α = .05. First, assume the data are from an independent-measures study using two separatesamples - and perform a complete HT, and write an APA summary, and find the CI for the difference between the means. Second, assume the data are from a repeated-measures study using the same sample ofn = 5 participants in both treatments - and perform a complete HT, and write an APA summary, and find the CI for the difference between the means. Explain why the 2-point mean difference is reliable for one test but not for the other. Control102I157Treatment1152189
Develop a 95% confidence interval for the population slope if the followingregression information are given: b1= 41.7, p-value = 0.02, and n = 35.
Suppose we took a random sample of 200 students and ask if they preferred morning, evening, or night classes. a.If 76 students preferred morning classes what is the 95% CI for the proportion of students who prefer morning classes? b. Based on this confidence interval what would be the decision to the hypothesis: H0 = .3 vs Ha ≠ .3 using alpha = .05? c.How large a sample should be taken in order to estimate the proportion to within 2%, with 99% confidence?

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