SOCC31H3 Chapter Notes - Chapter 10: Scatter Plot, Null Hypothesis
Document Summary
Correlation: age, intelligence and education attainment vary from one person to another and therefore referred to as variables. Many relationships are statistically significant- stronger than you would expect to obtain just as a result of sampling error alone. Scatter plot: set up as the x is arranged horizontally, y is measured across the vertical line. It can be either positive or negative in terms of direction. Positive correlation: respondents getting high scores on the x variables also tend to get high scores on the y variable. Negative correlation: respondents have high scores on the x variable and low scores on the y variable. One variable can increase while the other increase, until the other reverses itself so that one variable can increase while the other decrease. Correlation coefficient: expresses both strengths and weakness and direction of straight-line correlation. 1. 00, -. 60,-. 30 and -. 10 signify a negative relationship and +1. 00, +. 60, +. 30 and +. 10 indicate positive correlation.
