1. Susan Sound predicts that students will learn most effectively with a constantbackground sound, as opposed to an unpredictable sound or no sound at allShe randomly divides twenty-four students into three groups of eight. Allstudents study a passage of text for 30 minutes. Those in group 1 study withbackground sound at a constant volume in the background. Those in group 2study with noise that changes volume periodically. Those in group 3 studywith no sound at all. After studying, all students take a 10 point multiplechoice test over the material. Their scores followtest scoresSgroup7 46 86 6295 5 3 4 4 7 2 22 471 2 1 5 51) constant sound2) random sound3) no sound b) If your ANOVA test conclude significant differences among population means,then conduct a post hoc test. Which pairs of means differ significantly at theoverall 5% significance level

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Asked Nov 16, 2019
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1. Susan Sound predicts that students will learn most effectively with a constant
background sound, as opposed to an unpredictable sound or no sound at all
She randomly divides twenty-four students into three groups of eight. All
students study a passage of text for 30 minutes. Those in group 1 study with
background sound at a constant volume in the background. Those in group 2
study with noise that changes volume periodically. Those in group 3 study
with no sound at all. After studying, all students take a 10 point multiple
choice test over the material. Their scores follow
test scoresS
group
7 46 86 629
5 5 3 4 4 7 2 2
2 471 2 1 5 5
1) constant sound
2) random sound
3) no sound
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1. Susan Sound predicts that students will learn most effectively with a constant background sound, as opposed to an unpredictable sound or no sound at all She randomly divides twenty-four students into three groups of eight. All students study a passage of text for 30 minutes. Those in group 1 study with background sound at a constant volume in the background. Those in group 2 study with noise that changes volume periodically. Those in group 3 study with no sound at all. After studying, all students take a 10 point multiple choice test over the material. Their scores follow test scoresS group 7 46 86 629 5 5 3 4 4 7 2 2 2 471 2 1 5 5 1) constant sound 2) random sound 3) no sound

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b) If your ANOVA test conclude significant differences among population means,
then conduct a post hoc test. Which pairs of means differ significantly at the
overall 5% significance level
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b) If your ANOVA test conclude significant differences among population means, then conduct a post hoc test. Which pairs of means differ significantly at the overall 5% significance level

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Expert Answer

Step 1

The ANOVA:

The ANOVA, which is required to answer this question, ...

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Anova: Single Factor SUMMARY Groups Constant sound (1) Sum Count Average Variance 8 48 6 4.857143 Random sound (2) 8 32 4 2.857143 No sound (3) 8 27 3.375 4.839286 ANOVA F crit Source of Variation ss df MS F P-value 3.4668 Between Groups 30.08333 2 15.04167 3.594595 0.04544 Within Groups 87.875 21 4.184524 23 Total 117.9583 00 00 00

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