Observations are taken on sales of a certain mountain bike in 24 sporting goods stores. The regression model was Y= total sales (thousands of dollars), X1 = display floor space (square meters), X2 = competitors' advertising expenditures (thousands of dollars), X3 = advertised price (dollars per unit). (a) Fill in the values in the table given here. (Negative values should be indicated by a minus sign. Leave no cells blank - be certain to enter "O" wherever required. Round your t-values to 3 decimal places and p-values to 4 decimal places.) Predictor Coefficient SE tcalc p-value Intercept 1,254.2 300.2 FloorSpace 11.310 1.69 Competing Ads -6.260 3.999 Price -0.14748 ৪.০৪288 (b-1) What is the critical value of Student's tin Appendix D for a two-tailed test at a = .01? (Round your answer to 3 decimal places.) t-value = (b-2) Choose the correct option. O Only FloorSpace differs significantly from zero. O Only Price differs significantly from zero. O Only CompetingAds differs significantly from zero.

Observations are taken on sales of a certain mountain bike in 24 sporting goods stores. The regression model was Y= total sales (thousands of dollars), X1 = display floor space (square meters), X2 = competitors' advertising expenditures (thousands of dollars), X3 = advertised price (dollars per unit). (a) Fill in the values in the table given here. (Negative values should be indicated by a minus sign. Leave no cells blank - be certain to enter "O" wherever required. Round your t-values to 3 decimal places and p-values to 4 decimal places.) Predictor Coefficient SE tcalc p-value Intercept 1,254.2 300.2 FloorSpace 11.310 1.69 Competing Ads -6.260 3.999 Price -0.14748 ৪.০৪288 (b-1) What is the critical value of Student's tin Appendix D for a two-tailed test at a = .01? (Round your answer to 3 decimal places.) t-value = (b-2) Choose the correct option. O Only FloorSpace differs significantly from zero. O Only Price differs significantly from zero. O Only CompetingAds differs significantly from zero.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Concept explainers

Correlation

Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.

Linear Correlation

A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.

Regression Analysis

Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.

Question

Observations are taken on sales of a certain mountain bike in 24 sporting goods stores. The regression model was Y= total sales
(thousands of dollars), X1 = display floor space (square meters), X2 = competitors' advertising expenditures (thousands of dollars), X3 =
advertised price (dollars per unit).
(a) Fill in the values in the table given here. (Negative values should be indicated by a minus sign. Leave no cells blank - be certain
to enter "O" wherever required. Round your t-values to 3 decimal places and p-values to 4 decimal places.)
Predictor
Coefficient
SE
tcalc
P-value
Intercept
1,254.2
300.2
FloorSpace
11.310
1.69
Competing Ads
-6.260
3.999
Price
-0.14748
0.08280
(b-1) What is the critical value of Student's tin Appendix D for a two-tailed test at a = 01? (Round your answer to 3 decimal places.)
t-value
(b-2) Choose the correct option.
Only FloorSpace differs significantly from zero.
O Only Price differs significantly from zero.
O Only CompetingAds differs significantly from zero.

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