BUILDING BASIC SKILLS AND VOCABUL 1. Two variables have a positive lineat cor va

Question

BUILDING BASIC SKILLS AND VOCABUL 1. Two variables have a positive lineat cor variable increase or decrease as the independen 2. Two variables have a negative linear variable increase or decrease as the indepen correlation dent v ariable incr escribe the range of values for the correlation coefficient oes the sample correlation coefficient r 4. What d measure? Which indicates a stronger correlation: r = reasoning 0.918 or r =-0.9327 Expla Give examples of two variables that have perfect positive linear c and tw 5. o variables that have perfect negative linear correlation. in how to determine whether a sample correlation coefficie that the population correlation coefficient is significant. Discuss the difference between r and 8. In your own words, what does it mean to say "correlation causation"? Graphical Analysis In Exercises 9-14, determine whether positive linear correlation, a strong positive linear correlation, linear correlation, a strong negative linear correlation, or n between the variables. 10. 9. 12. y

Explanation / Answer

1) If two varaibles have positive correlation then one variable will increase/decrease then other will also increase/decrease. That is both varaiables deviates in the same direction

2) If two varaibles have negative correlation then one variable will increase then other will also decrease. That is both varaiables deviates in the opposite direction

3)range of correlation coefficient is -1 to 1

4) correlation measure the degree of association between wo varaiables.

if r=0.918

this indicates there is 92% positive correlation between two variables

if r=-0.932

this indicates there is 93% negaive correlation between two variables

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