The Excel file: DASSxlsx contains information recorded on a sample of 40 of the college students'...
A random sample of 214 junior and senior college students was taken. Each student reported the average amount of sleep they get per night (in minutes) and their current college GPA. Plots from a simple linear regression analysis are displayed below. Which of the following is true about the linearity condition? 1.The linearity condition is not satisfied because there is curvature in the normal probability plot of the residuals. 2.The linearity condition is satisfied because most of the residuals...
PLEASE ANSWER ALL parts . IF YOU CANT ANSWER ALL, KINDLY ANSWER PART (E) AND PART(F) FOR PART (E) THE REGRESSION MODEL IS ALSO GIVE AT THE END. REGRESSION MODEL: We will be returning to the mtcars dataset, last seen in assignment 4. The dataset mtcars is built into R. It was extracted from the 1974 Motor Trend US magazine, and comcaprises fuel consumption and 10 aspects of automobile design and performance for 32 automobiles (1973-74 models). You can find...
2. (13 pts.) The director of admissions of a small college selected 10 students at random from the new freshman class in a study to determine whether a student's GOA at the end of the freshman year can be predicted from the ACT test score. The data is GPA.csv. a) (4) Compute a linear regression to predict GPA based on the ACT test score. Y = 0.01 0147X + 2.908258 b) (2) Compute the residual standard deviation, s (2) Give...
Use the following information to answer questions 1-6 A sample of small cars was selected to attempt to use the horsepower (hp) of the car to predict the fuel efficiency (mpel. A researcher fitted a linear regression model. y = 44.0 -0.150x R2 = 68% 1. Interpret the slope of the regression line. b= -0.150 2. If a particular car has a horsepower of 150hp and a fuel efficiency of 25mpg, what is the residual for this car? 3. Calculate...
Locate Hospital Tab on Excel Data. View Data:https://drive.google.com/file/d/1HMgLG7BVcvpoQ6iUxjkL_xCBzvpgHhHp/view?usp=sharing Problem 1 What is a better predictor of the number of Personnel in a hospital? Using the "Excel Databases.xls" file, locate the tab for the Hospital Database. Use Excel to develop two simple regression models for the Hospital Database at a 5% significance level Model 1: Predict the number of Personnel by the number of Births Model 2: Predict number of Personnel by number of Beds Must complete all the parts to...
1. Calculate a regression equation using Anxiety as the predictor and Test Score as the predicted variable. What is the slope? 2. Which is an interpretation of the slope? 3. Using the same regression, what is the y-intercept? 4. Which is an interpretation of the y-intercept? 5. Use the regression equation to predict a Test Score for someone with an Anxiety level of 6. StudyTime Anxiety Die Roll Test Score Commute Class ID# 10 Senior Freshman Junior Senior Freshman Junior...
QUESTION 20 In a simple linear regression model the data is given as X: 1, 2, 3, 4; Y: 7, 10, 9, 12. The estimated intercept is 6. The estimated slope is 1.4. The sum of residuals is 0 3.2 5 38
In Professor Friedman's economics course the correlation between the students' total scores before the final examination and their final examination scores is r = 0.52. The pre-exam totals for all students in the course have mean 276 and standard deviation 21. The final exam scores have mean 50 and standard deviation 9. Professor Friedman has lost Julie's final exam but knows that her total before the exam was 318. He decides to predict Julie's final exam score from her pre-exam...
The well-known psychologist Dr. Elbod has established what he calls his Generalized Anxiety Scale (GAS). The GAS, which is a scale from 0 to 10, measures the "general anxiety" of an individual, with higher GAS scores corresponding to more anxiety. (Dr. Elbod's assessment of anxiety is based on a variety of measurements, both physiological and psychological.) we're interested in making predictions about individuals' sleep behavior based on their GAS scores. The bivarlate data below give the GAS score (denoted by...