Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Estimate the regression equation and correlation coefficient.

1. The following results were obtained from a simple regression analysis:
= 37.2895-(1.2024)X r2=.6744, Sb1=.2934

For each unit change in X (independent variable), the estimated change in Y (dependent variable) is equal to

a. -1.2024
b. 6744
c. 37.2895
d. 2934

2. The following results were obtained from a simple regression analysis:

= 37.2895-(1.2024)X r2=.6744 Sb1=.2934

When X (independent variable) is equal to zero, the estimated value of Y (dependent variable) is equal to:

a. -1.2024
b. 6744
c. 37.2895
d. 2934

3. The following results were obtained from a simple regression analysis:

= 37.2895-(1.2024)X r2=.6744 Sb1=.2934 ____________ is the proportion of the variation describeed by the simple linear regression model:

a. -1.2024
b. .6744
c. 37.2895
d. .2934

4. For the same set of observations on the specified dependent variable two different independent variables were used to develop two separate simple linear regression models. A portion of the results is presented below. Based on the results given above, we can conclude that:

a. A prediction based on Model 1 is better than a prediction based on Model 2
b. A prediction based on Model 2 is better than a prediction based on Model 1
c. There is no difference in the predictive ability between Model 1 and Model 2
d. There is not sufficient information to determine which of the two models is superior for prediction purposes

5. The local grocery store wants to find out the daily sales in dollars. The manager believes that the amount of newspaper advertising significantly affects the store sales. He randomly selects 7 days of data consisting of daily grocery store sales (in thousands of dollars) and advertising expenditures (in thousands of dollars). The Excel/Mega-Stat output given above summarizes the results of regression model.

What is the estimated simple linear regression equation?

a. 7.9682+1.667 X
b. 63.333+6.667 X
c. 7.948+4.000 X
d. 11.547+1.667 X
e. 6.667+63.333 X

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M922864

Have any Question? 


Related Questions in Statistics and Probability

Consider a repeated game with standard information where

Consider a repeated game with standard information, where each player maximizes his expected 8-discounted average payoff, for some 8 that is close to but less than 1. Payoffs at each round depend on the players' moves as ...

If the slope of a straight line is 23 and correlation

If the slope of a straight line is 2.3 and correlation coefficient is 0.777, calculate coefficient of determination.

You are interested in using linear regression to test

You are interested in using linear regression to test whether drinking a protein shake improves weightlifting performance. From a sample of 200 college students, you estimate a linear regression with WEIGHTLIFT as the de ...

Prior to distributing a large shipment of bottled water a

Prior to distributing a large shipment of bottled water, a beverage company would like to determine whether there is evidence that the true mean fill volume of all bottles di↵ers from 600 ml, which is the amount stated o ...

Peggy wants to know if her pack of cookies was

Peggy wants to know if her pack of cookies was statistically different from those of the rest of the class. She found out the average number of chips per cookie this year was 13.82 and the standard deviation for the clas ...

What is the difference between inter participant and intra

What is the difference between inter participant and intra participant variance? Which of these types of variance is more closely related to error variance in group experimental designs? Which type is of primary interest ...

Suppose we obtain a random sample of 80 champaign voters of

Suppose we obtain a random sample of 80 Champaign voters, of which 55 support marijuana legalization. We also obtain a random sample of 100 Urbana voters, of which 75 support marijuana legalization. Let pC be the true pr ...

Tell which measures are resistant to outliers and which are

Tell which measures are resistant to outliers and which are NOT resistant to outliers from the following list, and explain WHY or WHY NOT for each measure: Mean, median, Quartiles, correlation, and standard deviation.

In the following cross-lagged panel design does x appear to

In the following cross-lagged panel design, does X appear to cause Y, does Y appear to cause X, do both variables influence each other, or are X and Y unrelated?

In a recent survey of high school seniors a random sample

In a recent survey of high school seniors, a random sample of 1000 females showed that 650 were planning on pursuing a college degree, while a random sample of 1000 females showed that 600 were planning on pursuing a col ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro