Question
Data are collected for the scores y of n = 10 randomly selected students from a...
Data are collected for the scores y of n = 10 randomly selected students from a statistics class and the number of hours x they slept the night before the attempt. Summary statistics are x = 4.2, sx = 1.874, and se = 6.305; the least squares line is = 5.044x + 56.11. Construct a 95% prediction interval for the mean attempt score of a particular student that got x = 5 hours of sleep the night before the attempt (use 2 decimal places).
Homework Answers
Answer #1
Not the answer you're looking for?
Similar Questions
The data below are the final exam scores of 10 randomly selected history students and the...
The data below are the final exam scores of 10 randomly selected
history students and the number of hours they slept the night
before the exam. Find the equation of the regression line for the
given data. What would be the predicted score for a history student
who spent 15 hours the previous night? Is this a reasonable
question? Round your predicted score to the nearest whole number.
Round the regression line values to the nearest hundredth.
Hours, X, 3...
2. According to survey data collected from 500 students in a recent Statistics class, the histogram...
2. According to survey data collected from 500 students in a
recent Statistics class, the histogram for the number of hours of
sleep they typically got per night is close to the normal curve
with an average of 6.5 hours and a SD of 1.4 hours.
a) Find percentage of students who sleep between 7 and 8
hours
b) A student who sleeps 7 hours per night is at the _______th
percentile of the score distribution
c) Find the first...
The data below are the quiz scores of 10 randomly selected statistics students and the number...
The data below are the quiz scores of 10 randomly selected
statistics students and the number of hours they studied for the
exam. What is the best predicted value for y given x = 5? Assume
that the variables x and y have a significant correlation.
Hours, X
3, 5, 2, 8, 2, 4, 4, 5, 6, 3
Scores, y
65, 80, 60, 88, 66, 78, 85, 90, 90, 71
The data below are the final exam scores of 10 randomly selected statistics students and the...
The data below are the final exam scores of 10 randomly selected
statistics students and the number of hours they studied for the
exam. Test the significance of the correlation coefficient using =
0.05 and the claim = 0. Hours, x Scores, y 4 67 6 82 3 62 9 90 3 68
5 80 5 87 6 92 7 92 4 73
Suppose we have collected the midterm and final scores of 200 students in a Statistics class,...
Suppose we have collected the midterm and final scores of 200
students in a Statistics class, and we observed that the scatter
plot of final scores versus midterm scores is roughly linear.
Suppose the average midterm score is 76, with SD 12, and the
average final score is 71, with SD 10. Suppose the correlation
coefficient between midterm and final scores is 0.6.
Use the regression line, or an equivalent regression procedure, to
predict the final score for someone who...
As an aid for improving students' sleeping habits, nine students were randomly selected to attend a...
As an aid for improving students' sleeping habits, nine students
were randomly selected to attend a seminar on the importance of
sleep in life. The table below shows the number of hours each
student slept per week before the seminar.
Students
1
2
3
4
5
6
7
8
9
Before
9
12
6
15
3
18
10
13
7
After
9
17
9
20
2
21
15
22
6
a. Construct a 90% confidence interval for the difference of...
Suppose that you randomly selected 50 students at University and collected data on the following five...
Suppose that you randomly selected 50 students at University and
collected data on the following five variables
U: Number of courses the student is
taking this semester
V: The student’s class
X: The number of hours per week the
student plans to study
Y: The total cost of textbooks
Z: Method of payment for textbook
Questions:
a) What is the population?
b) Is the population finite or
infinite?
c) What is the sample?
d) Classify the five variables as
either...
The data below are the number of hours slept the night before the test and the...
The data below are the number of hours slept the night before
the test and the test scores of 9 randomly selected statistics
students.
Number of Absences, x
3
5
7
9
7
6
2
8
6
Test Grade %, y
62
71
80
82
93
65
51
89
54
a) Find the linear correlation coefficient, rounded to the
nearest ten-thousandth (4 decimal places).
b) Find the equation of the least-squares regression line. Round
your values to the nearest ten-thousandth...
The following data are quiz scores for two quizzes from 8 students in a class. First...
The following data are quiz scores for two quizzes from 8
students in a class.
First Quiz
Second Quiz
16
11
19
14
23
17
32
27
36
28
37
31
38
33
40
40
Least-squares Regression Line
What is the least-squares regression line? Round to three
decimal places.
ˆy=
Prediction
Predict the score of the second quiz if a student scored 39 on
the first quiz. Round to one decimal place.
The following data are quiz scores for two quizzes from 8 students in a class. First...
The following data are quiz scores for two quizzes from 8
students in a class.
First Quiz
Second Quiz
10
12
11
13
13
15
15
19
29
27
33
28
35
29
40
38
Least-squares Regression Line
1) What is the least-squares regression line? Round to three
decimal places.
ˆy=
2) Prediction
Predict the score of the second quiz if a student scored 49 on
the first quiz. Round to one decimal place.
=
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 10 minutes ago
asked 11 minutes ago
asked 11 minutes ago
asked 14 minutes ago
asked 53 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago