Homework Answers
Solution:-
If two quantitative variables are negatively correlated,This implies that
=> option d. The response variable tends to decrease when the predictor variable decreases
=> option g. The LOBF is upward sloping
=> option l. r > 0
=> option n. The p-value is greater than 0.05
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If two quantitative variables are negatively correlated, this implies that... (select all that apply; you have...
If two quantitative variables are negatively correlated, this implies that... (select all that apply) The response...
If two quantitative variables are negatively correlated, this implies that... (select all that apply) The response variable is always positive The response variable is always negative The response variable tends to increase when the predictor variable decreases The response variable tends to decrease when the predictor variable decreases The LOBF for the data is horizontal The LOBF for the data is vertical The LOBF is upward sloping The LOBF is downward sloping r < -1 r > 1 r <...
Confidence Interval review: Suppose you are trying to estimate the average age of the entire CSU student population. Yo...
Confidence Interval review: Suppose you are trying to estimate the average age of the entire CSU student population. You collect a sample of size n=180, and from your data you calculate: =20.8 S = 2.5 (round your answers to 3 decimal places) 1. The standard error of the mean for this data set is: 2. The approximate 95% margin of error is (Use the approximation method from the notes, in which the critical value is approximately 2.) 3. The approximate...
Current Score:-0 Due : Tuesday, July 3 2018 1159 PM Extension RequestsPrint Assignment Question 12 34...
Current Score:-0 Due : Tuesday, July 3 2018 1159 PM Extension RequestsPrint Assignment Question 12 34 -8-8-8-02-50(0.0%) Description This assignment covers correlation and simple linear regression. You have 5 attempts per question, unless otherwise noted For this assignment, you submit answers by question parts. The umber of submissions remaining for each question part only changes if you submit or change the answer Your last submission is used for your score -5 points If two quantitative variables are positively correlated, this...
The multiplication of two variables is used as a predictor if the two variables jointly affect...
The multiplication of two variables is used as a predictor if the two variables jointly affect the response. True O False Question 7 1 pts Even if the P-value of the F test in a multiple regression model is nearly zero, it is possible that the R of the model is much less than one. OT False Question 8 1 pts in selecting independent variables for a regression model, neither the forward selection method nor the backward elimination method guarantee...
Only 10 True or False questions. Please answer ALL questions. Thank you! 1) It is always...
Only 10 True or False questions. Please answer ALL questions. Thank you! 1) It is always the case that P(x) (profit), R(x) (revenue), and C(x) (costs) are best modeled by linear equations. 2) If you collect data on 2 variables x & y, and then you draw a scatter plot of the ordered pairs (x,y), the variables show positive correlation if the scatter plot decreases as you move from left to right. 3) To determine the break even point for...
These are all part of the same question if you cant answer them all dont asnwer at all. I will th...
These are all part of the same question if you cant answer them
all dont asnwer at all. I will thumbsdown. thanks
Let y denote the number of broken eggs in a randomly selected carton of one dozen eggs. Suppose that the probability distribution of v is as follows У01234 p(y) 0.64 0.20 0.11 0.04? (a) Only y values of 0, 1, 2, 3, and 4 have positive probabilities. What is p(4)? (Hint: Consider the properties of a discrete probability...
Need help with stats true or false questions Decide (with short explanations) whether the following statements are true or false a) We consider the model y-Ao +A(z) +E. Let (-0.01, 1.5) be a 95% con...
Need help with stats true or false questions
Decide (with short explanations) whether the following statements are true or false a) We consider the model y-Ao +A(z) +E. Let (-0.01, 1.5) be a 95% confidence interval for A In this case, a t-test with significance level 1% rejects the null hypothesis Ho : A-0 against a two sided alternative. b) Complicated models with a lot of parameters are better for prediction then simple models with just a few parameters c)...
1 out of 1 points This applies to questions 3 and 4 Suppose you have fit...
1 out of 1 points This applies to questions 3 and 4 Suppose you have fit a linear regression equation as follows: û = 200+ 0.10X1 +0.20x2 -0.93X3 Calculate the estimated value of y if xj is 100, x2 is 50, and x3 is 200. Provide your answer as a whole number. Selected Answer: 34 Question 4 O out of 1 points Suppose the true value of y is equal to 40 when X1 is 100, x2 is 50, and...
PLEASE SHOW ALL EXCEL FORMULAS USED FOR EACH CALCULATIONS. A STEP BY STEP WALKTHROUGH OF HOW TO DO THE PROBLEM. Thank you so much for your help! Hours Feet Elevator Elevator code 24.00 545 Y...
PLEASE SHOW ALL EXCEL FORMULAS USED FOR EACH CALCULATIONS. A
STEP BY STEP WALKTHROUGH OF HOW TO DO THE PROBLEM. Thank you so
much for your help!
Hours Feet Elevator Elevator
code
24.00 545 Yes 1
13.50 400 Yes 1
26.25 562 No 0
25.00 540 No 0
9.00 220 Yes 1
20.00 344 Yes 1
22.00 569 Yes 1
11.25 340 Yes 1
50.00 900 Yes 1
12.00 285 Yes 1
38.75 865 Yes 1
40.00 831 Yes 1...
1. For each of the following regression models, write down the X matrix and 3 vector....
1. For each of the following regression models, write down the X matrix and 3 vector. Assume in both cases that there are four observations (a) Y BoB1X1 + B2X1X2 (b) log Y Bo B1XiB2X2+ 2. For each of the following regression models, write down the X matrix and vector. Assume in both cases that there are five observations. (a) YB1XB2X2+BXE (b) VYBoB, X,a +2 log10 X2+E regression model never reduces R2, why 3. If adding predictor variables to a...
Confidence Interval review: Suppose you are trying to estimate the average age of the entire CSU student population. You collect a sample of size n=180, and from your data you calculate: =20.8 S = 2.5 (round your answers to 3 decimal places) 1. The standard error of the mean for this data set is: 2. The approximate 95% margin of error is (Use the approximation method from the notes, in which the critical value is approximately 2.) 3. The approximate...
Current Score:-0 Due : Tuesday, July 3 2018 1159 PM Extension RequestsPrint Assignment Question 12 34 -8-8-8-02-50(0.0%) Description This assignment covers correlation and simple linear regression. You have 5 attempts per question, unless otherwise noted For this assignment, you submit answers by question parts. The umber of submissions remaining for each question part only changes if you submit or change the answer Your last submission is used for your score -5 points If two quantitative variables are positively correlated, this...
The multiplication of two variables is used as a predictor if the two variables jointly affect the response. True O False Question 7 1 pts Even if the P-value of the F test in a multiple regression model is nearly zero, it is possible that the R of the model is much less than one. OT False Question 8 1 pts in selecting independent variables for a regression model, neither the forward selection method nor the backward elimination method guarantee...
These are all part of the same question if you cant answer them
all dont asnwer at all. I will thumbsdown. thanks
Let y denote the number of broken eggs in a randomly selected carton of one dozen eggs. Suppose that the probability distribution of v is as follows У01234 p(y) 0.64 0.20 0.11 0.04? (a) Only y values of 0, 1, 2, 3, and 4 have positive probabilities. What is p(4)? (Hint: Consider the properties of a discrete probability...
Need help with stats true or false questions
Decide (with short explanations) whether the following statements are true or false a) We consider the model y-Ao +A(z) +E. Let (-0.01, 1.5) be a 95% confidence interval for A In this case, a t-test with significance level 1% rejects the null hypothesis Ho : A-0 against a two sided alternative. b) Complicated models with a lot of parameters are better for prediction then simple models with just a few parameters c)...
1 out of 1 points This applies to questions 3 and 4 Suppose you have fit a linear regression equation as follows: û = 200+ 0.10X1 +0.20x2 -0.93X3 Calculate the estimated value of y if xj is 100, x2 is 50, and x3 is 200. Provide your answer as a whole number. Selected Answer: 34 Question 4 O out of 1 points Suppose the true value of y is equal to 40 when X1 is 100, x2 is 50, and...
PLEASE SHOW ALL EXCEL FORMULAS USED FOR EACH CALCULATIONS. A
STEP BY STEP WALKTHROUGH OF HOW TO DO THE PROBLEM. Thank you so
much for your help!
Hours Feet Elevator Elevator
code
24.00 545 Yes 1
13.50 400 Yes 1
26.25 562 No 0
25.00 540 No 0
9.00 220 Yes 1
20.00 344 Yes 1
22.00 569 Yes 1
11.25 340 Yes 1
50.00 900 Yes 1
12.00 285 Yes 1
38.75 865 Yes 1
40.00 831 Yes 1...
1. For each of the following regression models, write down the X matrix and 3 vector. Assume in both cases that there are four observations (a) Y BoB1X1 + B2X1X2 (b) log Y Bo B1XiB2X2+ 2. For each of the following regression models, write down the X matrix and vector. Assume in both cases that there are five observations. (a) YB1XB2X2+BXE (b) VYBoB, X,a +2 log10 X2+E regression model never reduces R2, why 3. If adding predictor variables to a...
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