April 1 st, 2015. Bellringer-April 1 st, 2015 Video Link Worksheet Link

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Presentation transcript:

April 1 st, 2015

Bellringer-April 1 st, 2015

Video Link Worksheet Link Linear Correlation and Pearson’s Correlation Coefficient

A set of data that has strong correlation has a definite linear pattern. A set of data that has weak correlation moves roughly in a linear fashion. A set of data with no correlation does not follow a pattern that can be modeled by a function.

The closer the data is to being a straight line, the stronger the correlation.

Strong Negative Weak Negative No Correlation Weak Positive Strong Positive

Strong Negative Weak Negative No Correlation Weak Positive Strong Positive Strong Negative Weak Negative No Correlation Weak Positive Strong Positive

Statistics and Probability Vocabulary Words Study online at quizlet.com/_1a1h5z 1. association The patterns or relationships identified in scatter plots 2. Bivariate Data Data for 2 variables (EX: Temperature and Ice Cream sales) 3. clustering Having similar numerical values EX: students tended to have scores clustering around 70 percent 4. dependent variable The variable whose value is determined by an independent variable 5. extrapolating Prediction of values that fall outside the plotted values on a scatter plot 6. independent variable The variable whose value is not determined by another variable Write your vocabulary words into your journal

7. interpolating Prediction of values that will fall within the plotted values on a scatter plot 8. linear association This occurs when the points on the scatter plot seem to form a line 9. linear regression To model the relationship of two variables in a data set by drawing a line of best fit 10. line of best fit a line that is as close to as many points as possible, but doesn't have to go through all the points 11. negative association A type of association where as one data set increases, the other decreases 12. outlier A point that varies greatly from the overall pattern of the data 13. positive association A type of association where both data sets increase together, or both decrease together 14. Scatter Plot A graph of a collection of ordered pairs that allows exploration of the relationship between the points. Hint: You do not connect the points. 15. trend line When a line of best fit is used, this line and its equation are often referred to as a model of the data