Student Absences and Grades on the Final ExamDr. V. noticed that the more frequently a student is late or absent from class the worse he or she performs on the final exam. He decided to investigate. Dr. V. collected a random sample of 22 students. This sample includes the number of times a student is absent and their grades on the final exam. The data can be found in the Excel file Assignment10_R1.xlsx on the Exercise1_Excel_Built-in f. worksheet. Do not use any software that I did not assign.Question 1: Which or the two variables (times absent or grades on the final exam) is the independent variable and which is the dependent variable? Question 2: Using Microsoft Excel: (Excel file Assignment10_R1.xlsx on the Exercise1_Excel_Built-in f.xlsx worksheet)Count the number of XY variables. Calculate the mean and sample standard deviation of both the independent and dependent variables. Calculate the correlation coefficient, r, using Excel’s CORREL function. Explain what it means. Calculate the coefficient of determination, r2, using Excel’s RSQ function. Explain what it means.. ABDFTimesLate/Final Exam1AbsentGradeAnswerFormulal-COUNT(A2:A23)84.0092.502132df=E2-2431646.00Coefficient of Correlation, r=CORREL(B2:B23,C2:C23)93.00 Coefficient of Determination, r?=RSQ(C2:C23,B2:B23)542651195.50Mean of Late/Absent=AVERAGE(B2:B23)762420.00Std. Dev. Of Late Absent=STDEV.S(B2:B23)8.7739.00Mean of Final Exam=AVERAGE(C2:C23)1046.00Std. Dev. Of Final Exam=STDEV.S(C2:C23)1091963.0073.5098.001110212 11213121724.5014 1373.0069.50815 142016 151949.0017 162368.5018 1770.0019 18475.5020 19278.0021 20797.0022 212100.0023 22293.50 AВDEAlpha0.05 givengiven=B2-2|=T.INV.2T(B1,B3)='Exercise1_Excel_Built-In f.'!E4|='Exercise1_Excel_Built-In f.'!E5Vn-2t=3df4CV t52V1-r²6.7=(B5*SQRT(B3))/SQRT(1-B6)=TDIST(ABS(B8), B3,2)8.9p-value10

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Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015

1st Edition

ISBN:9781680331141

Author:HOUGHTON MIFFLIN HARCOURT

Publisher:HOUGHTON MIFFLIN HARCOURT

Chapter4: Writing Linear Equations

Section: Chapter Questions

Problem 14CR

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Student Absences and Grades on the Final Exam

Dr. V. noticed that the more frequently a student is late or absent from class the worse he or she performs on the final exam. He decided to investigate. Dr. V. collected a random sample of 22 students. This sample includes the number of times a student is absent and their grades on the final exam. The data can be found in the Excel file Assignment10_R1.xlsx on the Exercise1_Excel_Built-in f. worksheet. Do not use any software that I did not assign.

Question 1: Which or the two variables (times absent or grades on the final exam) is the independent variable and which is the dependent variable?

Question 2: Using Microsoft Excel: (Excel file Assignment10_R1.xlsx on the Exercise1_Excel_Built-in f.xlsx worksheet)

Count the number of XY variables.

Calculate the mean and sample standard deviation of both the independent and dependent variables.

Calculate the correlation coefficient, r, using Excel’s CORREL function. Explain what it means.

Calculate the coefficient of determination, r², using Excel’s RSQ function. Explain what it means..

A
B
D
F
Times
Late/
Final Exam
1
Absent
Grade
Answer
Formula
l-COUNT(A2:A23)
84.00
92.50
2
1
3
2
df
=E2-2
4
3
16
46.00
Coefficient of Correlation, r
=CORREL(B2:B23,C2:C23)
93.00 Coefficient of Determination, r?
=RSQ(C2:C23,B2:B23)
5
4
2
6
5
11
95.50
Mean of Late/Absent
=AVERAGE(B2:B23)
7
6
24
20.00
Std. Dev. Of Late Absent
=STDEV.S(B2:B23)
8.
7
7
39.00
Mean of Final Exam
=AVERAGE(C2:C23)
10
46.00
Std. Dev. Of Final Exam
=STDEV.S(C2:C23)
10
9
19
63.00
73.50
98.00
11
10
2
12 11
2
13
12
17
24.50
14 13
73.00
69.50
8
15 14
20
16 15
19
49.00
17 16
23
68.50
18 17
70.00
19 18
4
75.50
20 19
2
78.00
21 20
7
97.00
22 21
2
100.00
23 22
2
93.50

A
В
D
E
Alpha
0.05 given
given
=B2-2
|=T.INV.2T(B1,B3)
='Exercise1_Excel_Built-In f.'!E4
|='Exercise1_Excel_Built-In f.'!E5
Vn-2
t=
3
df
4
CV t
5
2
V1-r²
6.
7
=(B5*SQRT(B3))/SQRT(1-B6)
=TDIST(ABS(B8), B3,2)
8.
9
p-value
10

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