Homework Answers
42) intercept =Ybar-b1*Xbar =7-2*4 =-1
43) relationship is to prediction
45) true
46)SSerror =SST*(1-R2)=100*(1-0.7^2) =51
Add Answer to:
If you were to develop a linear regression equation that uses autonomy at work to predict...
Question 41 2 pts This question and the next question are based on the following same...
Question 41 2 pts This question and the next question are based on the following same information. If you were to develop a linear regression equation that uses autonomy at work to predict job satisfaction, what would be the slope (b) of the regression equation? Autonomy (X) Job satisfaction (Y) n 8 8 Mean Mx=4 My=7 Variability SSX = 28 SSy = 156 SP = 56 Pearson =.85 0.85 02 .5 0.36 Question 42 Question 33 2 pts Under what...
--FACTOR ANOVA: SEE 408 RSON CORRELATION: SEE P. 465 GRESSION: SEE P. 467 -SQUARE GOODNESS OF...
--FACTOR ANOVA: SEE 408 RSON CORRELATION: SEE P. 465 GRESSION: SEE P. 467 -SQUARE GOODNESS OF FIT: SEE P.501 1-SQUARE TEST FOR INDEPENDENCE: SEE P.502 4 pts Question 33 This regression problem (chp 14) can be solved with SPSS (steps p.500) and/or by hand. In the height and income study for men, height was classified into 5 categories from 1-tallest to 5-shortest and had a mean of Mx-3 with a SSx=20. Income, measured in thousands, had a mean score of...
4. Scatter plots and calculating correlation
4. Scatter plots and calculating correlation Suppose you are given the following five pairs of scores: XY61926384110Create a scatter plot of these scores in the following diagram. For each of the five (X,Y) pairs, click on the plotting symbol (the black X) in the upper right corner of the tool, and drag it to the appropriate location on the grid. Based on your scatter plot, you would expect the correlation to be _______ .The mean X score is Mx = _______ , and...
You are investigating the relationship between centimeters of snowfall and cheerfulness for Canadians in mid-January. You...
You are investigating the relationship between centimeters of snowfall and cheerfulness for Canadians in mid-January. You have obtained the following values: SP = 35 SSx= 105 Mx=1.7 MY= 3.1 Calculate the slope and intercept, then report the regression equation for Y. Describe how cheerfulness is predicted to change with each cm of snowfall. Include the appropriate quantification
1.) A researcher hypothesizes that people who spend more time surfing the internet will spend less...
1.) A researcher hypothesizes that people who spend more time surfing the internet will spend less time socializing in real life situations. He/she measures the relationship between internet use (X; hours per week) and social interaction (Y; hours per week) in a sample of n 10 students. The following table lists the hypothetical results of this study: Internet Use (X) Social Interaction (Y) (X-Mx) (X- MACY-My) (Y-My) 4 09 a 6 6 a 12 2 3 3 6 5 2...
1. A therapist specializing in family counseling measures the relationship between partners and marital satisfaction. Husbands...
1. A therapist specializing in family counseling measures the relationship between partners and marital satisfaction. Husbands and wives rated how satisfied they were in their marriage using a 7-point rating scale ranging from 1 (not satisfied at all) to 7 (very satisfied). Using the hypothetical data given in the following table, compute the Pearson correlation coefficient. (Round your answer to three decimal places.) Husband Wife X Y 1 6 2 6 3 6 4 6 5 6 6 6 7...
Using the Excel’s Regression Tool, develop the estimated regression equation to show how income (y annual...
Using the Excel’s Regression Tool, develop the estimated regression equation to show how income (y annual income in $1000s) is related to the independent variables education (x1 level of education attained in number of years), age (x2 in years), and gender x3 dummy variable, 1= female, 0 = male. Develop the dummy variable for the gender variable first. Use the t test to test whether each of the coefficients obtained in part (a) are significant at .05 level of significance....
Show work please, Thanks! Question 3: The regression line equation for a set of data is...
Show work please, Thanks!
Question 3: The regression line equation for a set of data is given by y-hat = 2.3x+5 with n = 10. The mean value of y is 10.1 for the data set. Use a = 0.05. A. If the linear correlation coefficient is r=0.521, what is the best predicted y-value for x = 5? Justify for your answer. B. If the linear correlation coefficient is r = 0.972, what is the best predicted y-value for x...
correlations and linear regression education and income 3. Use the following data set and complete the table. (Inc...
correlations and linear regression education and income
3. Use the following data set and complete the table. (Income is the dependent variable and education is the independent variable) Education (Years) I x -* Yi- } (x; - x)(y;-)) (x; -x² Income ($1000) 15 46 13 17 58 46 13 10 40 63 15 18 11 9 11 15 45 12 50 16 9 14 48 58 14 16 50 11 a. Calculate x, y, and the standard deviations for both...
1. Develop the simple linear regression equation to predict repair time given the number of months...
1. Develop the simple linear regression equation to predict
repair time given the number of months since
the last maintenance service, and use the results to check the
conditions necessary for valid inference in
regression, and to test the hypothesis that no relationship exists
between repair time and the number of
months since the last maintenance service at the 0.05 level of
significance. What is the interpretation of
this relationship? What does the coefficient of determination tell
you about this...
Question 41 2 pts This question and the next question are based on the following same information. If you were to develop a linear regression equation that uses autonomy at work to predict job satisfaction, what would be the slope (b) of the regression equation? Autonomy (X) Job satisfaction (Y) n 8 8 Mean Mx=4 My=7 Variability SSX = 28 SSy = 156 SP = 56 Pearson =.85 0.85 02 .5 0.36 Question 42 Question 33 2 pts Under what...
--FACTOR ANOVA: SEE 408 RSON CORRELATION: SEE P. 465 GRESSION: SEE P. 467 -SQUARE GOODNESS OF FIT: SEE P.501 1-SQUARE TEST FOR INDEPENDENCE: SEE P.502 4 pts Question 33 This regression problem (chp 14) can be solved with SPSS (steps p.500) and/or by hand. In the height and income study for men, height was classified into 5 categories from 1-tallest to 5-shortest and had a mean of Mx-3 with a SSx=20. Income, measured in thousands, had a mean score of...
1.) A researcher hypothesizes that people who spend more time surfing the internet will spend less time socializing in real life situations. He/she measures the relationship between internet use (X; hours per week) and social interaction (Y; hours per week) in a sample of n 10 students. The following table lists the hypothetical results of this study: Internet Use (X) Social Interaction (Y) (X-Mx) (X- MACY-My) (Y-My) 4 09 a 6 6 a 12 2 3 3 6 5 2...
Show work please, Thanks!
Question 3: The regression line equation for a set of data is given by y-hat = 2.3x+5 with n = 10. The mean value of y is 10.1 for the data set. Use a = 0.05. A. If the linear correlation coefficient is r=0.521, what is the best predicted y-value for x = 5? Justify for your answer. B. If the linear correlation coefficient is r = 0.972, what is the best predicted y-value for x...
correlations and linear regression education and income
3. Use the following data set and complete the table. (Income is the dependent variable and education is the independent variable) Education (Years) I x -* Yi- } (x; - x)(y;-)) (x; -x² Income ($1000) 15 46 13 17 58 46 13 10 40 63 15 18 11 9 11 15 45 12 50 16 9 14 48 58 14 16 50 11 a. Calculate x, y, and the standard deviations for both...
1. Develop the simple linear regression equation to predict
repair time given the number of months since
the last maintenance service, and use the results to check the
conditions necessary for valid inference in
regression, and to test the hypothesis that no relationship exists
between repair time and the number of
months since the last maintenance service at the 0.05 level of
significance. What is the interpretation of
this relationship? What does the coefficient of determination tell
you about this...
Most questions answered within 3 hours.
-
In the Metric System, the basic unit of measurement for length
is ___
In the Metric...
asked 1 minute from now -
A sample of C3H8 has 1.60×1024 H atoms.
How many carbon atoms does the sample contain?...
asked 5 minutes ago -
Discuss the sales orders process module(s) in the Enterprise
Resource Planning system. How does it contribute...
asked 7 minutes ago -
The position in an object as a function of time is given as ?
(?) =...
asked 8 minutes ago -
Design a class for python named PersonData with the following
member variables:
lastName
firstName
address
city...
asked 21 minutes ago -
How does use of the risk/need/responsivity model impact
effective rehabilitation services?
asked 26 minutes ago -
Your rich uncle has just given you a high school graduation
present of $900,000. The present,...
asked 28 minutes ago -
1=Write a program in C to get 16-bit data from Port-D and send
it to ports...
asked 27 minutes ago -
Calculate Ecell for the following reaction and conditions: 0.50
M Br2 (aq), 0.10 M Pb+2 (aq),...
asked 47 minutes ago -
There can be more than one correct answer.
Hypophysiotropic hormones:
A. released by the hypothalamus
B....
asked 53 minutes ago -
Scott Ruskin is the CEO of Decatur Materials. The company has
been struggling for the last...
asked 51 minutes ago -
If you were conducting a study involving twins regarding
genetics and/or upbringing, which would you use?...
asked 1 hour ago