Question
In: Statistics and Probability
The following data is examm score and hours studied that week from a sample of 10...
The following data is examm score and hours studied that week from a sample of 10 students.
| Student | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Examm Score | 56 | 64 | 64 | 66 | 69 | 70 | 70 | 71 | 82 | 91 |
| Hours Studied | 0.5 | 1.4 | 2.1 | 3.0 | 4.2 | 4.5 | 4.9 | 5.7 | 7.5 | 8.6 |
a) Using the IQR rule, are there any outliers for the examm scores? If so write down the number(s). Give the interval that defines the outliers.
b) Determine the correlation coefficient, r, between examm score and hours studied. Interpret what this number means.
c) Determine the least-square regression equation to predict examm scores based on hours studied.
d) If a student studies for 5 hours what is the predicted examm score?
e) Give the residual for student 2.
f) Give the coefficient of determination, R^2, for this least-squares equation. Give the interpretation of this number.
Please answer all parts and write clearly. :)
Solutions
orchestra answered 1 year agoRelated Solutions
The following information shows the number of hours students studied for classwork and the score they...
The following information shows the number of hours students
studied for classwork and the score they got on the classwork. Show
your work to receive credit.
Hours Studied x 8 4 9 6 3 2 11 7
Score y 72 64 81 59 43 47 89 70
a) Compute the value of the correlation coefficient r.
b) Find the equation of the regression line.
1. Sample data on exam grades (Y), hours studied (X1) and homework average (X2) was used...
1. Sample data on exam grades (Y), hours studied (X1)
and homework average (X2) was used to estimate the
following regression equation:
Y-hat = 60 + 5X1 + .1 X2
a. Interpret the value of the estimated constant (a)
b. Interpret the estimated coefficient on X1
c. Interpret the estimated coefficient on X2
d. Predict the grade of a student who studied 5 hours and had a
homework average of 90.
Please answer questions and show work.
Thanks
answer with steps you will be rated The following data is exa score and hours looking...
answer with steps you will be rated
The following data is exa score and hours looking at social
media in that week of the exa from a sample of 10 students.
Student
1
2
3
4
5
6
7
8
9
10
Exa Score
50
67
72
73
79
83
85
86
89
92
Hours
9.5
9.5
8.2
7.8
6.7
5.9
5.5
4.2
1.8
0.1
a) (3 points) Using the IQR rule, are there any
outliers for the exa scores? If...
1) A student wishes to determine the association between Hours Studied and Test Score. She also...
1) A student wishes to determine the association between Hours
Studied and Test Score. She also wants to determine the association
between Hours of Sleep before the Test and the Test Score.
Hours Studied
1
3
2.5
4
5
5
3
4
Hours Slept
6
7
7
8
8
8
5
6.5
Test Score
72
80
78
90
94
96
88
84
Which factor (hours studied or hours slept) is a stronger
association with test score? (Show data to support...
the following table shows the distribution of hours worked each week on average for a sample...
the following table shows the distribution of hours worked
each week on average for a sample of 100 community college
students.
hours per week
number of
students
0-9 24
10-19. 14
20-29. 39
30-39. 18
40-49. 5
1) what is mean? round 3 decimals
2) standard deviation of sample? round 3 decimals
3) what is the mid point of the class 20-29?
4) do a histograms of the data ; shape of distribution?
5) what is quartile 75 of distribution?
a consultant for a large university studied the number of hours per week freshmen watch tv...
a consultant for a large university studied the number of hours
per week freshmen watch tv versus the number of hours seniors do.
the results of this study follow. is there enough evidence to show
the mean number of hours per week freshmen watch tv is different
from the mean number of hours seniors do at alpha=.1. freshmen
n=10, xbar=18.6, s=7.8740 seniors n=4, xbar=11.4, s=3.9749
a consultant for a large university studied the number of hours per week freshmen watch tv...
a consultant for a large university studied the number of hours
per week freshmen watch tv versus the number of hours seniors do.
the results of this study follow. is there enough evidence to show
the mean number of hours per week freshmen watch tv is different
from the mean number of hours seniors do at alpha=.1. freshmen
n=10, xbar=18.6, s=7.8740 seniors n=4, xbar=11.4, s=3.9749
A consultant for a large university studied the number of hours per week freshmen watch TV...
A consultant for a large university studied the number of hours
per week freshmen watch TV versus the number of hours seniors do.
The result of this study follow. Is there enough evidence to show
the mean number of hours per week freshman watch TV is different
from the mean number of hours seniors do at alpha= 0.01?
Freshmen
Seniors
n
8
4
xbar
18.2
11.9
s
7.8740
3.9749
For the Hypothesis stated above (in terms of Seniors-
Freshmen)
What...
The variable Hours Studied represents the number of hours a student studied for their final exam...
The variable Hours Studied represents the number of hours a
student studied for their final exam and the variable Final Exam
Grade represents the final exam score the student received on their
final exam (out of 100 points).An introduction,
explanation/interpretation of your analysis, and a conclusion.
Hours studied- 1, 0, 7, 9, 9, 5, 4, 2, 11, 7, 13, 3, 3, 1, 9, 7,
5, 0, 2, 8
Final Exam grade 70, 54, 81, 92, 90, 78, 75, 68, 98,...
The following data are from a random sample of 10 students who participated in a study...
The following data are from a random sample of 10 students who
participated in a study undertaken to investigate the effect of
sleep time (measured in average number of hours of sleep per night)
on GPA (grade point average, measured on a 4-point scale).
Student
Sleep time
GPA
1
7
3.28
2
9
3.16
3
8
3.75
4
6
2.50
5
4
2.45
6
8
2.91
7
7
3.53
8
6
3.02
9
3
2.30
10
8
3.48
a. Find...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- 3) You are rolling a 12 sided die 8 times. a) What is the size for...
- explain the difference between quantitative and qualitative research strategies. Provide an example of a crime based...
- use postorder and inorder tree traversals to make preorder traversal. #!/usr/bin/env python3 # encoding: UTF-8 """Turning...
- 1. Write an if-else statement to describe an object. Print "Balloon" if isBalloon is true and...
- An investor is considering purchasing a Treasury bond with a 20 year maturity, an 8% coupon...
- Write a program that copies the contents of one file to a destination file. This program...
- how to conduct a marketing mix for 3d crest white strips
ADVERTISEMENT