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QuizChapter10Solutions

# QuizChapter10Solutions - y g’{1(a Math 300 — Quiz for...

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Unformatted text preview: y g’ {1 (a Math 300 — Quiz for Chapter 10 Printed Name: ﬁe E [,1 Calculators are allowed on this quiz...neighbors are not! The number of absences and the ﬁnal grades of seven randon‘ily selected students from 3. statistics class are givei‘l below. Student Number of absences :1: ﬁnal grade ’1} (%) A (3 82 B 2 86 C- 15 43 D 9 74 E 12 58 F 5 90 G 8 "('8 Construct a scatter plot Where the horizontal axis1 11:, represents the number of absences and the vertical axis, y, represents the final grade. 3! 90 i &- \$ 80 L % g l ~% 70 g— 60! g 511 @3 40 i 30 i 20 L 10 I 1 Nome. ”‘ 1 1 I3 1 1 _.I. mmmmm t .1: 2 4 6 S a 10 12 14 16 S L; 1; Compute the correlation coefﬁcient, '1'. ... C“ O _‘ (Lita: 2°: What does your correlation coefficient indicate about the relationship between absences and grades? / l tall; i radial] ea .__ii"¢‘"trrv/ J inf? (3%:ng J iii“ 55-?“ ii {53:2 557“" iii”? ‘ D ‘1 9‘5 Find the re rression line, 1 ’ W— a + bra. E: J A” j 3 102.11%“ M1 "x E ’4 1"” if a student has 10 absences, what would the regression line predict for their final grade? ESE-é“ 1i \$70 Dr. Ennnert Summer 2010 I of I Points Earned [:l of 20 ...
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