Twenty students took a test. The average grade was 86 with a standard deviation of 9....
Twenty students took a test. The average grade was 86 with a standard deviation of 9.
Data was collected for x: minutes studies and y: score on test
The correlation coefficient was r = .43
The regression line was ŷ = -12 + .75x
What score do you predict for someone that studied 120 minutes ___________
Data was collected for x: grade point and y: score on test
The correlation coefficient was r = .76
The regression line was ŷ = 24 + 17.3x
What score do you predict for someone with a grade point of 2.4____________
Homework Answers
Add Answer to:
Twenty students took a test. The average grade was 86 with a
standard deviation of 9....
What is the relationship between the amount of time statistics students study per week and their...
What is the relationship between the amount of time statistics students study per week and their test scores? The results of the survey are shown below. Time 13 10 9 9 2 10 12 8 Score 84 83 90 76 74 86 99 85 x-values y-values Find the correlation coefficient: r=r= Round to 2 decimal places. The null and alternative hypotheses for correlation are: H0:H0: ? r ρ μ == 0 H1:H1: ? μ ρ r ≠≠ 0 The p-value is: (Round to...
2. This week, we studied the test score Y versus number of hours, X, spent on test preparation, of a student in a French class of 10 students with the collected results shown below Number of hours s...
2. This week, we studied the test score Y versus number of hours, X, spent on test preparation, of a student in a French class of 10 students with the collected results shown below Number of hours studied Test score 31 10 14 73 37 12 60 91 21 84 17 (a) Use linear normal regression analysis method or the least-squares approximation method to predict the average test score of a student who studied 12 hours for the test (b)...
Grade point average. The director of admissions of a small college seleeted 120 students at random...
Grade point average. The director of admissions of a small college seleeted 120 students at random from the new freshman class in a study to determine whether a student's grade point average (GPA) at the end of the freshman year (Y) can be predicted from the ACT test score (X) The results of the study follow. Assume that first-order regression model (1.1) is appropriate. 2 118 119 120 i: Xi: 21 Yi: 14 28 28 16 28 3.897 3.885 3.778.....
Run a regression analysis on the following data set, where y is the final grade in...
Run a regression analysis on the following data set, where y is the final grade in a math class and x is the average number of hours the student spent working on math each week. hours/week Grade х у 4 41.6 4 54.6 8 68.2 8 73.2 8 66.2 11 63.4 11 70.4 11 80.4 13 71.2 16 85.4 State the regression equation y = mx + b, with constants accurate to two decimal places. What is the predicted value...
What is the relationship between the amount of time statistics students study per week and their...
What is the relationship between the amount of time statistics students study per week and their test scores? The results of the survey are shown below. Time 16 14 15 6 14 15 6 Score 100 89 100 68 99 100 78 x-values y-values Find the correlation coefficient: r=r= Round to 2 decimal places. The null and alternative hypotheses for correlation are: H0:H0: ? ρ r μ == 0 H1:H1: ? μ r ρ ≠≠ 0 The p-value is: (Round to four decimal...
A popular, nationwide standardized test taken by high-school juniors and seniors may or may not m...
A popular, nationwide standardized test taken by high-school juniors and seniors may or may not measure academic potential, but we can nonetheless exarmiune the relationship between scores on thos test and peroracen measure academie potental. but We have chosen a random sample of fifteen students just finishing their first year of college, and for each student we've recorded her score on this standardized test (from 400 to 1600) and her grade point average (from 0 to 4) for her first...
Research was conducted on the amount of training for 5K and the time a contestant took...
Research was conducted on the amount of training for 5K and the time a contestant took to run the race. The researcher recorded the number of miles during training ( a 1 month period) and the time to complete the 5K. The results are below. Miles Trained 63 72 62 66 75 21 Time (Minutes) 17.5 24.6 20.5 31.5 28.8 27.1 a) Give the correlation coefficient. b) Give the equation of the regression line. Round the values to 4 deimal...
(5 points each) Given the data below, answer the questions 5. | 2 | 5 |...
(5 points each) Given the data below, answer the questions 5. | 2 | 5 | 7 | 8 | 10 y 5 6 109 12 a) Find the value of the linear correlation coefficient r. b) Is there a linear correlation between the x and y values? Do a test. c) Find the equation of the regression line. Predict y when x is 10. d) Find the value of the rank correlation coefficient rs
Assume that the correlation coefficient between achievement test scores (X) and grade point averages (Y) among...
Assume that the correlation coefficient between achievement test scores (X) and grade point averages (Y) among a simple random sample of 34 first grade students is 0.52. Then, we can conclude that approximately 27% of the variance in grade point averages is explained by achievement test scores. Note, the statistic referenced in the previous sentence is the coefficient of determination, aka R-squared. True False
IB math studies 1. Ten students were asked for their average grade at the end of their last year...
IB math studies
1. Ten students were asked for their average grade at the end of their last year of high school and their average grade at the end of their last year at university. The results were put into a table as follows: Student High School grade, University grade, y 90 3.2 2.6 75 80 3.0 70 95 3.8 85 90 3.8 2.8 70 95 85 3.0 3.5 10 Total 835 30.4 (a) Given that s, 8.96, sy-0.610 and...
2. This week, we studied the test score Y versus number of hours, X, spent on test preparation, of a student in a French class of 10 students with the collected results shown below Number of hours studied Test score 31 10 14 73 37 12 60 91 21 84 17 (a) Use linear normal regression analysis method or the least-squares approximation method to predict the average test score of a student who studied 12 hours for the test (b)...
Grade point average. The director of admissions of a small college seleeted 120 students at random from the new freshman class in a study to determine whether a student's grade point average (GPA) at the end of the freshman year (Y) can be predicted from the ACT test score (X) The results of the study follow. Assume that first-order regression model (1.1) is appropriate. 2 118 119 120 i: Xi: 21 Yi: 14 28 28 16 28 3.897 3.885 3.778.....
Run a regression analysis on the following data set, where y is the final grade in a math class and x is the average number of hours the student spent working on math each week. hours/week Grade х у 4 41.6 4 54.6 8 68.2 8 73.2 8 66.2 11 63.4 11 70.4 11 80.4 13 71.2 16 85.4 State the regression equation y = mx + b, with constants accurate to two decimal places. What is the predicted value...
A popular, nationwide standardized test taken by high-school juniors and seniors may or may not measure academic potential, but we can nonetheless exarmiune the relationship between scores on thos test and peroracen measure academie potental. but We have chosen a random sample of fifteen students just finishing their first year of college, and for each student we've recorded her score on this standardized test (from 400 to 1600) and her grade point average (from 0 to 4) for her first...
Research was conducted on the amount of training for 5K and the time a contestant took to run the race. The researcher recorded the number of miles during training ( a 1 month period) and the time to complete the 5K. The results are below. Miles Trained 63 72 62 66 75 21 Time (Minutes) 17.5 24.6 20.5 31.5 28.8 27.1 a) Give the correlation coefficient. b) Give the equation of the regression line. Round the values to 4 deimal...
(5 points each) Given the data below, answer the questions 5. | 2 | 5 | 7 | 8 | 10 y 5 6 109 12 a) Find the value of the linear correlation coefficient r. b) Is there a linear correlation between the x and y values? Do a test. c) Find the equation of the regression line. Predict y when x is 10. d) Find the value of the rank correlation coefficient rs
IB math studies
1. Ten students were asked for their average grade at the end of their last year of high school and their average grade at the end of their last year at university. The results were put into a table as follows: Student High School grade, University grade, y 90 3.2 2.6 75 80 3.0 70 95 3.8 85 90 3.8 2.8 70 95 85 3.0 3.5 10 Total 835 30.4 (a) Given that s, 8.96, sy-0.610 and...
Most questions answered within 3 hours.
-
DP Gumby produces sleeveless sweaters. He can separate the
demand function into a domestic component: QD=...
asked 6 minutes ago -
6) Weak acids are not very soluble in water. A). TRUE B).
FALSE
The answer says...
asked 12 minutes ago -
Lab #2 Address Book Unsorted List (C++)
Using classes, design an online address book to keep...
asked 21 minutes ago -
Tucson Machinery, Inc., manufactures numerically controlled
machines, which sell for an average price of $0.5 million...
asked 37 minutes ago -
Review the referenced paper by Melse (2008). Describe the
research question being addressed. Discuss the methods...
asked 42 minutes ago -
Please do all parts. I don't want to hear your as per guidelines
stuff. Do if...
asked 51 minutes ago -
1. Why is Hardy-Weinberg Theorum important? How can we
test whether a population is in H-W...
asked 52 minutes ago -
A sample of 3 is selected from 9 cards. How many permutation is
possible? Show Work.
asked 1 hour ago -
Identify a commercial data mining software product (e.g., SAS)
and an open-source data mining product (e.g.,...
asked 1 hour ago -
Following are the capital account balances for the William,
Jennings, and Bryan partnership:
William (40% of...
asked 59 minutes ago -
An investment project provides cash inflows of $770 per year for
11 years.
a. What is...
asked 1 hour ago -
About the lecture of human resource management, give me the
process and schedule of how the...
asked 1 hour ago