Homework Answers
1.
SST = Σ(y - ȳ)2 = 3948
2.
SSE = SST - SSR = 3948 - 208 = 3740
3.
MSE = SSE / df of regression = 3740 / 1 = 3740
4.
Slope (a) = Σ(x - x̅).(y - ȳ) / Σ(x - x̅)2 = -312/468 = -0.6667
5.
Intercept (b) = ȳ - a * x̅ = (Σy)/n - a * (Σx)/n = (680/4) - (-0.6667)*(180/4) = 200
Add Answer to:
Section B: Long Questions - - B1: The following information regarding a dependent variable Y and...
Case 1 The following information regarding a dependent variable Y and an independent variable X is...
Case 1 The following information regarding a dependent variable Y and an independent variable X is provided. ZX-16 Σ(X-x)(Y-Y) SST-42 n=4 SSE 34 Refer to case 1. The slope of the regression function is 0.1 Refer to case 1. The slope of the regression function is Refer to case 1. The slope of the regression function is Refer to case 1. The slope of the regression function is -1 Refer to Case 1. The Y intercept is 0.1 Refer to...
4 Consider the following set of ordered pairs. a) Calculate the slope and y-intercept for these...
4 Consider the following set of ordered pairs. a) Calculate the slope and y-intercept for these data. b) Calculate the total sum of squares (SST). c) Partition the sum of squares into the SSR and SSE. a) Calculate the slope and y-intercept for these data. y- Round to four decimal places as needed.) b) Calculate the total sum of squares (SST) SST c) Partition the sum of squares into the SSR and SSE. (Round to one decimal place as needed.)...
a) Calculate the slope and y-intercept for these data. b) Calculate the total sum of squares...
a) Calculate the slope and y-intercept for these data. b) Calculate the total sum of squares (SST). c) Partition the sum of squares into the SSR and SSE. a) Calculate the slope and y-intercept for these data. y = + x (Round to four decimal places as needed.)
Consider the following set of ordered pairs. 5 4 1 n 5 5 3 2 4...
Consider the following set of ordered pairs. 5 4 1 n 5 5 3 2 4 3 у 3 a) Calculate the slope and y-intercept for these data. b) Calculate the total sum of squares (SST). c) Partition the sum of squares into the SSR and SSE. a) Calculate the slope and y-intercept for these data. X у (Round to four decimal places as needed.) b) Calculate the total sum of squares (SST). SST = (Round to one decimal place...
A) Calculate the slope and y-intercept for these data. B) Calculate the total sum of squares...
A) Calculate the slope and y-intercept for these data.
B) Calculate the total sum of squares (SST).
C) Partition the sum of squares into the SSR and SSE.
Cursider she fallrwing set af ardered pairs a) Calculate the slope and y intercept for these dala. b) Caiculatc the total sum of squares ISST c) Pa ton the sum of squaresmo the SSH, and SSE sum ct saunto tme SSH
Consider the following set of ordered pairs. X 4 5 4 6 3 3 у a)...
Consider the following set of ordered pairs. X 4 5 4 6 3 3 у a) Calculate the slope and y-intercept for these data. b) Calculate the total sum of squares (SST). c) Partition the sum of squares into the SSR and SSE. a) Calculate the slope and y-intercept for these data. y=-x (Round to four decimal places as needed.)
An instructor asked a random sample of eight students to record their study times at the...
An instructor asked a random sample of eight students to record their study times at the beginning of a course. She then made a table for total hours studied (x) over 2 weeks and test score (y) at the end of the 2 weeks. The table is given below. Complete parts (a) through (d). X 11 1512 208 15 16 21 0 y 91 76 83 75 89 77 80 80 Ex= 118, Ey= 651, Exy = 9,464, Ex2 =...
The following information regarding a dependent variable (Y in $1000) and an independent variable (X) is...
The following information
regarding a dependent variable (Y in $1000) and an independent
variable (X) is provided.
Y
Dependent Variable
15
17
23
17
I. The least-squares estimate of the slope
equals:
II. The least-squares estimate of the intercept
equals:
III. If the independent variable increases by 2
units, the dependent variable is expected to
a. decrease by $300
b. decrease by $3000
c. decrease by $3
d. decrease by $2
e. none of the above
The letter corresponding...
The following information regarding a dependent variable (Y in $1000) and an independent variable (X) is...
The following information regarding a dependent variable (Y in
$1000) and an independent variable (X) is provided.
Y
Dependent Variable
15
17
23
17
I. The least-squares estimate of the slope
equals:
II. The least-squares estimate of the intercept
equals:
III. If the independent variable increases by 2
units, the dependent variable is expected to
a. decrease by $300
b. decrease by $3000
c. decrease by $3
d. decrease by $2
e. none of the above
The letter corresponding...
Part of an Excel output relating 15 observations of X (independent variable) and Y (dependent variable)...
Part of an Excel output relating 15 observations of X (independent variable) and Y (dependent variable) is shown below. Provide the values for a-e shown in the table below. (See section 15.5) Summary Output ANOVA df SS MS F Significance F Regression 1 2.7500 -d- -e- 0.632 Residual -a- -b- 11.45 Total 14 -c- A Company has recorded data on daily demand for its product (y in thousands of units) and the unit price (x in hundreds of dollars). A...
Case 1 The following information regarding a dependent variable Y and an independent variable X is provided. ZX-16 Σ(X-x)(Y-Y) SST-42 n=4 SSE 34 Refer to case 1. The slope of the regression function is 0.1 Refer to case 1. The slope of the regression function is Refer to case 1. The slope of the regression function is Refer to case 1. The slope of the regression function is -1 Refer to Case 1. The Y intercept is 0.1 Refer to...
4 Consider the following set of ordered pairs. a) Calculate the slope and y-intercept for these data. b) Calculate the total sum of squares (SST). c) Partition the sum of squares into the SSR and SSE. a) Calculate the slope and y-intercept for these data. y- Round to four decimal places as needed.) b) Calculate the total sum of squares (SST) SST c) Partition the sum of squares into the SSR and SSE. (Round to one decimal place as needed.)...
a) Calculate the slope and y-intercept for these data. b) Calculate the total sum of squares (SST). c) Partition the sum of squares into the SSR and SSE. a) Calculate the slope and y-intercept for these data. y = + x (Round to four decimal places as needed.)
Consider the following set of ordered pairs. 5 4 1 n 5 5 3 2 4 3 у 3 a) Calculate the slope and y-intercept for these data. b) Calculate the total sum of squares (SST). c) Partition the sum of squares into the SSR and SSE. a) Calculate the slope and y-intercept for these data. X у (Round to four decimal places as needed.) b) Calculate the total sum of squares (SST). SST = (Round to one decimal place...
A) Calculate the slope and y-intercept for these data.
B) Calculate the total sum of squares (SST).
C) Partition the sum of squares into the SSR and SSE.
Cursider she fallrwing set af ardered pairs a) Calculate the slope and y intercept for these dala. b) Caiculatc the total sum of squares ISST c) Pa ton the sum of squaresmo the SSH, and SSE sum ct saunto tme SSH
Consider the following set of ordered pairs. X 4 5 4 6 3 3 у a) Calculate the slope and y-intercept for these data. b) Calculate the total sum of squares (SST). c) Partition the sum of squares into the SSR and SSE. a) Calculate the slope and y-intercept for these data. y=-x (Round to four decimal places as needed.)
An instructor asked a random sample of eight students to record their study times at the beginning of a course. She then made a table for total hours studied (x) over 2 weeks and test score (y) at the end of the 2 weeks. The table is given below. Complete parts (a) through (d). X 11 1512 208 15 16 21 0 y 91 76 83 75 89 77 80 80 Ex= 118, Ey= 651, Exy = 9,464, Ex2 =...
The following information
regarding a dependent variable (Y in $1000) and an independent
variable (X) is provided.
Y
Dependent Variable
15
17
23
17
I. The least-squares estimate of the slope
equals:
II. The least-squares estimate of the intercept
equals:
III. If the independent variable increases by 2
units, the dependent variable is expected to
a. decrease by $300
b. decrease by $3000
c. decrease by $3
d. decrease by $2
e. none of the above
The letter corresponding...
The following information regarding a dependent variable (Y in
$1000) and an independent variable (X) is provided.
Y
Dependent Variable
15
17
23
17
I. The least-squares estimate of the slope
equals:
II. The least-squares estimate of the intercept
equals:
III. If the independent variable increases by 2
units, the dependent variable is expected to
a. decrease by $300
b. decrease by $3000
c. decrease by $3
d. decrease by $2
e. none of the above
The letter corresponding...
Most questions answered within 3 hours.
-
What percent of revenue does net income represent for each
year?
Total Revenue
2017 = 60,319,000...
asked 5 minutes ago -
For Ti+2 (Z=22). Determine the correct ground state
& # of microstates. Use the correct tanabe...
asked 9 minutes ago -
Why did so many investment banks have to start buying CDO’s and
other mortgaged backed securities...
asked 24 minutes ago -
The mean cost of domestic airfares in the United States rose to
an all-time high of...
asked 35 minutes ago -
1.Magazine Luiza is a Brazilian retail chain for consumer
electronics. The company currently has 100 stores...
asked 33 minutes ago -
What is the molarity of ZnCl2 that forms when 25.0 g of zinc
completely reacts with...
asked 35 minutes ago -
For independent X and Y, we have probability density function
for them where pdf of X...
asked 46 minutes ago -
The decomposition of SO2Cl2 is first order in SO2Cl2 and has a
rate constant of 1.42...
asked 42 minutes ago -
How do I convert from volume percent to mole percent in the
distillation lab? ethy acetate...
asked 49 minutes ago -
8. An air-plane has an effective wing surface area of 14.0 m²
that is generating the...
asked 50 minutes ago -
A railroad worker was a person who worked on setting and moving
railroad tracks. In securing...
asked 48 minutes ago -
using RECURSIVE Functions in Java, create a public static String
doubleLetters (String word)
For ex) that...
asked 55 minutes ago