O The related coefficient of determination is 0.1 O All of the other answers are true O Only 10% of the variation of the ice-cream sales is explained by different outdoor temperatures. O c in the linear regression mode Y = b + cX is positive O 90% of the variation of the ice-cream sales is due to the variance of the sales itself.

O The related coefficient of determination is 0.1 O All of the other answers are true O Only 10% of the variation of the ice-cream sales is explained by different outdoor temperatures. O c in the linear regression mode Y = b + cX is positive O 90% of the variation of the ice-cream sales is due to the variance of the sales itself.

College Algebra

1st Edition

ISBN:9781938168383

Author:Jay Abramson

Publisher:Jay Abramson

Chapter4: Linear Functions

Section4.3: Fitting Linear Models To Data

Problem 34SE: For the following exercises, consider this scenario: The profit of a company decreased steadily...

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Question 27

In March, Maggie collected the daily sales of ice-cream in Montreal (Y) and the outdoor temperature for each day (X). She computed the sample correlation coefficient between X and Y to be 0.1, and used the data to build a simple linear regression model Y = b + cX.

O The related coefficient of determination is 0.1
O All of the other answers are true
O Only 10% of the variation of the ice-cream sales is explained by different outdoor temperatures.
O c in the linear regression mode Y = b + cX is positive
O 90% of the variation of the ice-cream sales is due to the variance of the sales itself.

Definition Definition Statistical measure used to assess the strength and direction of relationships between two variables. Correlation coefficients range between -1 and 1. A coefficient value of 0 indicates that there is no relationship between the variables, whereas a -1 or 1 indicates that there is a perfect negative or positive correlation.

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