moodle-courses 1 7 18. wollwaro ncsu edu TIME OUT IN A TREEHOUSE-YouTube Quiz 8
ID: 2931281 • Letter: M
Question
moodle-courses 1 7 18. wollwaro ncsu edu TIME OUT IN A TREEHOUSE-YouTube Quiz 8 (due Oct 24) NC STATE Courses 2017-2018 An educational psychologist designs a study to examine the effect of background noise on studying effectiveness. She randomly divides twenty-four students into three groups of eight. All students study a passage of text for 30 minutes Th050 rgop 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. The resulting data is analyzed using an analysis of variance. A partially completed ANOVA table is below. Use this to answer questions 7 to 10 at a constant volume in the background. Those in group 2 MS F-statistic p-value 0.0454 30.083 87.875 3.595 BB8 Total what decison and conclusion can we make from this ouput using a 1% significance level? Select one or more: We should reject the nul hypothesis. Poirs out of There is evidence of a difference in average quiz score between the 3 groups We cannot reject the null hypothesis There is not sufticient evidence of a diffierence in average quir score between the 3 groups The Mean Square Treatment (MSTry) is missing from this ouput (replaced with AAAI Find this value Round your answer to 3 decimal places Ports out of 3 6Explanation / Answer
Answer - 7:
Since p - value is greater than 0.01, we do not reject Ho. Hence,
There is not sufficient evidence of difference.
Option C and Option D are correct.
Answer - 8:
MSTr = 30.083/2 = 15.042
Answer - 9:
Degrees of freedom = 24 - 3 = 21
Answer - 10:
SST = 30.083 + 87.875 = 117.958
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