Question

These four questions are based on the given information below about two variables, X and Y:...

These four questions are based on the given information below about two variables, X and Y:
Covariance of X and Y = 82.8
Variance of X = 662.3
Variance of Y = 14.6
Mean of X = 45.6
Mean of Y = 7.6
SSR = 62.1

What is the value of the y-intercept?

13.53

46.59

44.61

1.67

Homework Answers

Answer #1

TOPIC:Least-square regression equation.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Given below is a bivariate distribution for the random variables x and y f(x,y) x y...
Given below is a bivariate distribution for the random variables x and y f(x,y) x y 0.3 80 70 0.4 30 50 0.3 50 60 a. Compute the expected value and the variance for x and y E(x)= E(y)= Var(x)= Var(y)= b. Develop a probability distribution for x+y x+y f(x+y) 150 80 110 c. Using the result of part (b), compute E(x+y) and Var(x+y) . E(x+y) Var(x+y) d. Compute the covariance and correlation for x and y. If required, round...
Given below is a bivariate distribution for the random variables x and y. f(x, y) x...
Given below is a bivariate distribution for the random variables x and y. f(x, y) x y 0.1 90 90 0.5 30 40 0.4 50 70 a. Compute the expected value and the variance for x and y. E(x) = E(y) = Var(x) = Var(y) = b. Develop a probability distribution for x + y. Round your answers to one decimal place. x + y f(x + y) 180 70 120 c. Using the result of part (b), compute E(x...
Given below is a bivariate distribution for the random variables x and y. f(x, y) x...
Given below is a bivariate distribution for the random variables x and y. f(x, y) x y 0.5 50 80 0.2 30 50 0.3 40 60 (a) Compute the expected value and the variance for x and y. E(x) = E(y) = Var(x) = Var(y) = (b) Develop a probability distribution for x + y. x + y f(x + y) 130 80 100 (c) Using the result of part (b), compute E(x + y) and Var(x + y). E(x...
15.1The probability density function of the X and Y compound random variables is given below. X                         &nbsp
15.1The probability density function of the X and Y compound random variables is given below. X                                        Y 1 2 3 1 234 225 84 2 180 453 161 3 39 192 157 Accordingly, after finding the possibilities for each value, the expected value, variance and standard deviation; Interpret the asymmetry measure (a3) when the 3rd moment (µ3 = 0.0005) according to the arithmetic mean and the kurtosis measure (a4) when the 4th moment (µ4 = 0.004) according to the arithmetic...
Use the probability distribution given in the table below and consider two new random​ variables, W​...
Use the probability distribution given in the table below and consider two new random​ variables, W​ =  6+7X and V​ =3+1Y​, to answer the following questions Joint Distribution of Weather Conditions and Commuting Times Rain​(X= 0) No Rain(X= 1) Total Long commute(Y= 0) 0.79 0.03 0.82 Short commute(Y= 1) 0.04 0.14 0.18 Total 0.83 0.17 1.00 A.Compute the mean of W. E(W)​= (Round your response to two decimal places​) B.Compute the mean of V. E(V)​= (Round your response to two...
Questions 1-17 are related to the following Below are the values for two variables x and...
Questions 1-17 are related to the following Below are the values for two variables x and y obtained from a sample of size 5.  We want to build a regression equation based the sample data. ŷ = b₀ + b₁x y x 18 5 25 10 9 5 30 15 46 18 12 Sum of squares total (SST) is, a 753.9 b 761.5 c 769.2 d 776.9 13 Sum of squares regression (SSR) is, a 676.50 b 683.37 c 690.20 d...
Consider joint Probability distribution of two random variables X and Y given as following f(x,y)   X...
Consider joint Probability distribution of two random variables X and Y given as following f(x,y)   X        2   4   6 Y   1   0.1   0.15   0.06    3   0.17   0.1   0.18    5   0.04   0.07   0.13 (a)   Find expected value of g(X,Y) = XY2 (b)   Find Covariance of Cov(x,y)
Use the probability distribution given in the table below and consider two new random​ variables, W​...
Use the probability distribution given in the table below and consider two new random​ variables, W​ =  7+2X and V​ =4+1Y​, to answer the following questions Joint Distribution of Weather Conditions and Commuting Times Rain​(X= 0) No Rain(X= 1) Total Long commute(Y= 0) 0.58 0.14 0.72 Short commute(Y= 1) 0.05 0.23 0.28 Total 0.63 0.37 1.00 A.Compute the mean of W. E(W)​= (Round your response to two decimal places​) B.Compute the mean of V. E(V)​= (Round your response to two...
Given are five observations for two variables, x and y. xi 1 2 3 4 5...
Given are five observations for two variables, x and y. xi 1 2 3 4 5 yi 4 6 6 11 15 Which of the following scatter diagrams accurately represents the data? 1. 2. 3. What does the scatter diagram indicate about the relationship between the two variables? Develop the estimated regression equation by computing the the slope and the y intercept of the estimated regression line (to 1 decimal). ŷ = + x Use the estimated regression equation to...
Given below are seven observations collected in a regression study on two variables, x (independent variable)...
Given below are seven observations collected in a regression study on two variables, x (independent variable) and y (dependent variable). x y 2 12 3 9 6 8 7 7 8 6 7 5 9 2 Given the followings b1 = -1.13 SSR = 50.625 SSE= 9.376 Sb1 = .2165 a. At 95% confidence, perform a t test and determine whether or not the slope is significantly different from zero.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT