Statistics Correlation Coefficient

Calculates the Pearson’s sample correlation coefficient of the given data. Show your solution in your answer sheet.

• -0.944

• -0.499

• 0.499

• 0.944

Based on the description of Correlation Coefficient of the given data. What is the appropriate interpretation? Complete the statement in your answer sheet.

• It slightly suggests that the more ___ a student has, the lower is his or her ___.

• It slightly suggests that the more ___ a student has, the higher is his or her ___.

• It strongly suggests that the more ___ a student has, the lower is his or her ___.

• It strongly suggests that the more ___ a student has, the higher is his or her ___.

Which of the following best the describes shape (form) based on the scatter plot of the given data. Explain your answer in your answer sheet.

• linear correlation

• spatial correlation

• ordinary correlation

• curvilinear correlation

Which of the following best the describes trend (direction), and variation (strength) based on the scatter plot of the given data. Explain your answer in your answer sheet.

• weak negative correlation

• strong negative correlation

• weak positive correlation

• strong positive correlation

Data is analyzed comparing hours studied and grades. It is determined that the correlation coefficient is 0.92. This means there is a

(a)   between studying and grades.

• strong positive correlation

• strong negative correlation

• weak positive correlation

• weak negative correlation

Match the following correlation coefficients.

• weak positive

• 0.48

• weak negative

• -0.25

• strong negative

• 0.56

• strong positive

• -0.95

What's true about r and r²?

• All function types

• Only linear functions

Tags

R vs R^2

Which of the following best describes trend (direction), and variation (strength) based on Correlation Coefficient of the given data. Explain your answer in your answer sheet.

• weak negative correlation

• moderate negative correlation

• strong negative correlation

• perfect negative correlation

To test the claim that there is significant correlation between the number of absences and the final grades of seven randomly selected students from a statistics class, what is the appropriate hypothesis? Write the statement form of your answer.

To test the claim that there is significant correlation between the number of absences and the final grades of seven randomly selected students from a statistics class, determine the appropriate critical value at 0.05 significance level? Illustrate in your answer sheet.