An educational researcher is analyzing the test scores for statistics students taught using twodifferent methods a traditional method and a web-based self-paced method. Can he conclude, at a= .05, that the test scores in the web-based self-paced method are lower?%3DTraditionalWeb-based Self-pacedSample size6040Mean test Score7875Sample variance2434O The data does not support the claim because the test value 1.20 is less than than 1.64.O The data does not support the claim because the test value 1.20 is less than than 1.96.Ở The data supports the claim because the test value 2.68 is greater than than 1.96.O The data supports the claim because the test value 2.68 is greater than than 1.64.

The mean difference between the population and the sample is calculated using the z test for larger…

Answered: An educational researcher is analyzing…

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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What is the difference between correlation and causation in statistics and why is it important to distinguish between the two?
An experiment was conducted on rodents to determine if the drug Haldol influenced the amount of "rough play." Five groups were included in the experiment. Subsequent behavior in terms of mean "rough play" behaviors was recorded. The output and box plot below, display the mean differences from baseline (i.e., after the drug was administered compared to before drug administration). What are the null and alternative hypotheses of this test? Summary of Roughplay differences Scd. Dev. Haldol dese Mean Freq. -.63158419 13.290618 19 Vehicle | 0.025 mg i 0.05 mg/ 1 0.1 mg/k -12.754389 13.783537 0.2 mg/k I 18 1.1481501 20.447041 5.0499951 16.035879 20 19 -20.S5 16.431064 20 Total -5.6631968 1B.558994 96 Analysis of Variance Frob F (p-value) Source SS df KS F Test- Statistic 8999.32832 4 2249.33203 9.63 0.0000 Between groups Within groups 91 260.682623 23722.1178 Tozal 32721.4461 95 344.436275 chif (4) 4.1710 Prob>chiz = 0.303 = Bartlett's test for equal variances: Roeghpiay diferences -50 Ho: 0…
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