explain thepartici-22. A researcher investigated the effect ofof randomly selected students and obtained the following means and sums ofpants' accuracy rates while performing a difficult task. He tested three groupssquares:XnLow Volume Moderate Volume61.54SourceBetween groupsWithin groupsTotal65.55Sum of Squares652.16612.751264.92High Volumedf48.257Mean SquareFa) Complete the ANOVA. (b) At a = .05, what is Ferit? (c) Report the statisticalesults in the proper format. (d) Perform the appropriate post hoc tests. (e) Whatyou conclude about this study? (f) Compute the effect size and interpret it.

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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 investigated the effect of different volumes of background noise on participants’ accuracy rates while performing a difficult task. He tested three groups (n = 11) and obtained thefollowing means: for low volume, X̅ = 66.5; for medium, X̅ = 61.5; for loud, X̅ = 48.25. He computed the following sums of squares: Source Sum of Squares df Mean Square F Between 452.16 Within 522.75 Total 974.91 Complete the ANOVA summary table. What are H0 and Ha? What is Fcrit? What do you conclude about Fobt? Perform the Tukey HSD test if appropriate. What do you conclude about this relationship? What is the effect size in this study, and what does this tell you about this factor?
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In a science fair project, Emily conducted an experiment in which she tested professional touch Ktherapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placing their hand just under Emily's hand without seeing it and without touching it. Among 357 trials, the touch therapists were correct 169 times. Complete parts (a) through (d). S View an example Get more help. 4- & 87 U 0.5 (Type an integer or a decimal. Do not round.) b. Using Emily's sample results, what is the best point estimate of the therapists' success rate? 0.473 (Round to three decimal places as needed.) c. Using Emily's sample results, construct a 90% confidence interval estimate of the proportion of correct responses made by touch therapists. F
To determine whether caffeine consumption affects the ability to solve math problems, a researcher had one group solve math problems after taking a cup of caffeinated drink and another group solve math problems after taking a cup of water. The group who took the caffeinated drink completed 35 problems in one hour and the group that had water completed 20 problems in one hour. Assuming the number of problems solved is normally distributed in each group, what statistical test would be used to test the research hypothesis? Explain your answer.
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To determine whether caffeine consumption affects the ability to solve math problems, a researcher had one group solve math problems after taking a cup of caffeinated drink and another group solves math problems after taking a cup of water. The group who took the caffeinated drink completed 35 problems in one hour and the group that had water completed 20 problems in one hour. Assuming the number of problems solved is normally distributed in each group, what statistical test would be used to test the research hypothesis? Explain your answer.

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A researcher investi of randomly selected students and obtained the following means and sums of pants' accuracy rates while performing a difficult task. He tested three groups squares: Low Volume Moderate Volume High Volume 48 25