A statistics instructor analyzed exam scores from their statistics class, where exam scores were scored between...
A statistics instructor analyzed exam scores from their statistics class, where exam scores were scored between 0 and 100. The regression line relating Final Exam scores to Midterm Exam scores is: final = 48.6 + 0.48 * midterm. question: Interpret the R-Squared value of 0.36 for this model:
Answer options:
A. 36% of the variability in final exam score is explained by midterm exam score.
B. The correlation between final exam score and midterm exam score is 0.36.
C. 64% of the variability in final exam score is explained by midterm exam score.
D. The correlation between final exam score and midterm exam score is 0.64.
Homework Answers
Interpretation of R - square is:
36% of the variability in final exam score is explained by midterm exam score.
Option A is correct.
Add Answer to:
A statistics instructor analyzed exam scores from their
statistics class, where exam scores were scored between...
Consider the following scatterplot, regression equation, and correlation of midterm and final exam scores for a...
Consider the following scatterplot, regression equation, and correlation of midterm and final exam scores for a class of 15 students. Which of the following are true statements? Select one answer ı points Y ะ 90.6-0.489x , r -0.602 110 100 90 80 , 5어 2 20 40 60 80 100 Mdterm Exam Score I. The same number of students scored 100 on the midterm exam as scored 100 on the final exam. II. Students who scored higher on the midterm...
In an introductory statistics course, let x equal the midterm exam score and y equal the...
In an introductory statistics course, let x equal the midterm exam score and y equal the final exam score. Both have a mean of 84 and a standard deviation of 6. The correlation between the exam scores is 0.68. a. Find the regression equation. b. Find the predicted final exam score for a student with a midterm score of 84 and another with a midterm exam score of 93.
in an introductory statistics course, let x equal the midterm exam score and y equal the...
in an introductory statistics course, let x equal the midterm exam score and y equal the final exam score. Both have a mean of 79 and a standard deviation of 99. The correlation between the exam scores is 0.73 a. Find the regression equation. b. Find the predicted final exam score for a student with a midterm score of 79 and another with a midterm exam score of 89
Exam grades: Scores on a statistics final in a large class were normally distributed with a...
Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 71 and a standard deviation of 8. Use the TI-84 PLUS calculator to answer the following. Round the answers to at least two decimals. ol. (a) Find the 47th percentile of the scores. (b) Find the 65th percentile of the scores. (c) The instructor wants to give an A to the students whose scores were in the top 12% of the class....
Exam grades: Scores on a statistics final in a large class were normally distributed with a...
Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 78 and a standard deviation of 7. Use the TI-84 PLUS calculator to answer the following. Round the answers to at least two decimals. (a) Find the 34" percentile of the scores. (b) Find the 68th percentile of the scores. (C) The instructor wants to give an A to the students whose scores were in the top 11% of the class. What...
Exam grades: Scores on a statistics final in a large class were normally distributed with a...
Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 71 and a standard deviation of 8. Use the T1-84 PLUS calculator to answer the following. Round the answers to at least two decimals. (a) Find the 47 percentile of the scores (b) Find the 65 percentile of the scores. (c) The instructor wants to give an A to the students whose scores were in the top 12% of the class. What...
The final exam scores in a statistics class were normally distributed with a mean of 70...
The final exam scores in a statistics class were normally distributed with a mean of 70 and a standard deviation of 2. If you select a student at random, what is the probability that he scored between a 66 and a 74? A.2.5% B.50% C. 68% C. 95% D. none of the above
The final exam scores in a statistics class were normally distributed with a mean of 70...
The final exam scores in a statistics class were normally distributed with a mean of 70 and a standard deviation of five. What is the probability that a student scored more than 75% on the exam? a) 0.95 b)0.68 c) 0.16 d)0.84
Solve the problem. 4) 4) The midterm and final exam scores of 10 students in a statistics course ...
Solve the problem. 4) 4) The midterm and final exam scores of 10 students in a statistics course are observed and re in variable X and Y. The observed data yield (a) Find a (b) Find B. (c) Calculate the least squares regression line frormthese data. (d) If a student's midterm score is 75, what is his predicted final exam score? (e) If one has calculated σ-18, what is the 95% confidence interval for Y when the studen midtern score...
A statistics instructor taught her class that a regression line is a better predictor than the...
A statistics instructor taught her class that a regression line is a better predictor than the mean. As an example, the instructor analyzed a set of data in which the sum of squared deviations based on the mean was 59 and the sum of squared deviations based on the regression line was 43. In that example, what was the proportionate reduction in error? Question 16 options: .47 .27 .37 .17
Consider the following scatterplot, regression equation, and correlation of midterm and final exam scores for a class of 15 students. Which of the following are true statements? Select one answer ı points Y ะ 90.6-0.489x , r -0.602 110 100 90 80 , 5어 2 20 40 60 80 100 Mdterm Exam Score I. The same number of students scored 100 on the midterm exam as scored 100 on the final exam. II. Students who scored higher on the midterm...
Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 71 and a standard deviation of 8. Use the TI-84 PLUS calculator to answer the following. Round the answers to at least two decimals. ol. (a) Find the 47th percentile of the scores. (b) Find the 65th percentile of the scores. (c) The instructor wants to give an A to the students whose scores were in the top 12% of the class....
Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 78 and a standard deviation of 7. Use the TI-84 PLUS calculator to answer the following. Round the answers to at least two decimals. (a) Find the 34" percentile of the scores. (b) Find the 68th percentile of the scores. (C) The instructor wants to give an A to the students whose scores were in the top 11% of the class. What...
Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 71 and a standard deviation of 8. Use the T1-84 PLUS calculator to answer the following. Round the answers to at least two decimals. (a) Find the 47 percentile of the scores (b) Find the 65 percentile of the scores. (c) The instructor wants to give an A to the students whose scores were in the top 12% of the class. What...
Solve the problem. 4) 4) The midterm and final exam scores of 10 students in a statistics course are observed and re in variable X and Y. The observed data yield (a) Find a (b) Find B. (c) Calculate the least squares regression line frormthese data. (d) If a student's midterm score is 75, what is his predicted final exam score? (e) If one has calculated σ-18, what is the 95% confidence interval for Y when the studen midtern score...
Most questions answered within 3 hours.
-
An MNE is this kind of industry when competition in one country
is essentially independent of...
asked 1 hour ago -
. For this set of questions, determine what
proportion of a normal distribution is located betweeneach...
asked 1 hour ago -
A college student is employed as a door-to-door newspaper
salesman. Historical data suggests that the student...
asked 2 hours ago -
MATLAB HW 11 problem using Switch Case and Input commands
Write a script file that calculates...
asked 2 hours ago -
Considering gravitational time dilation, calculate the time that
passes in Earth’s surface while 1 hour passes...
asked 3 hours ago -
Minitab Problem: Take the Lake Hume June rainfall data and find
use the processes outlined in...
asked 4 hours ago -
X Company is trying to decide whether to continue using old
equipment to make Product A...
asked 4 hours ago -
IN PYTHON ONLY !! Program 2: Re-work
program #5 (WeeklyHours) from the previous assignment such that...
asked 4 hours ago -
The average length of time between arrivals at a turnpike
toll-booth is 26 seconds. What is...
asked 6 hours ago -
(a) A piston at 6.1 atm contains a gas that occupies a volume of
3.5 L....
asked 7 hours ago -
Please answer true or false. Words
cannot be changed or added in to make it true...
asked 7 hours ago -
An empty test tube weighs 15.923 grams. Then,
MgCl2•6H2O is added into the test tube. After...
asked 7 hours ago