Statistics A Correlation Page 6 of 6 Google Chrome https con

Statistics A: Correlation Page 6 of 6 Google Chrome https/ /content chrome online lessonViewer.aspx?header true&idCourse; 34568&idUnit; 25300&idLesson; 295303&page; Connexus Com Lesson 4: Correlation Statistics A Unit 3: Introduction to Bivariate and Categorical Data 1. Which of the following would not be a correct interpretation of a correlation of r 90? (2 points The variables are inversely related Most of the data points fall very close to a distinct pattern. O There exists a positive relationship between the variables There exists a strong relationship between the variables All of the above statements are correct. Consider the following scatterplot of midterm and final exam scores for a class of 15 students. Which of the following are true statement 8 90 Md ler Ban core I. The same number of students scored 100 on the midterm exam as scored 100 on the final exam. II. Students who scored higher on the midterm exam tended to score higher on the final exam. III. The scatterplot shows a moderate negative correlation between midterm and final exam scores. (2 points) javascript: doPostBack(ctl06SstartButton\',\'\') &idWebuser; 9084678 idSection 51373 T O 6 of 6 11:25 PM 1/4/2015

Solution

Hi,

The correct answers are as follows:

1. The vaibales are inverely related

Explanation: The variables are not inversly related as the corelation coefficient is positive

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2.Option (B) I and III is the correct answer

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3. Option (C), 0.23

The correlation coeffcient will remain the same

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4. Option (D), we found a correlation (0.91)between age and height if childern, is the correct answer