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CCGPSAlg-Unit 4
| Question | Answer |
|---|---|
| Association | A connection between data values |
| Bivariate data | Pairs of linked numerical observations |
| Box-and-Whisker Plot | A diagram that shows the five-number summary of a distribution |
| Center | Measures of center refer to the summary measures used to describe the most “typical” value in a set of data |
| Conditional Frequencies | The relative frequencies in the body of a two-way frequency table |
| Correlation Coefficient | A measure of the strength of the linear relationship between two variables that is defined in terms of the (sample) covariance of the variables divided by their (sample) standard deviations |
| Dot plot | A method of visually displaying a distribution of data values where each data value is shown as a dot or mark above a number line |
| First Quartile (Q1) | The “middle value” in the lower half of the rank-ordered data |
| Histogram | |
| Interquartile Range | A measure of variation in a set of numerical data |
| Line of best fit (trend or regression line) | A straight line that best represents the data on a scatter plot |
| Mean absolute deviation | A measure of variation in a set of numerical data, computed by adding the distances between each data value and the mean, then dividing by the number of data values |
| Outlier | Sometimes, distributions are characterized by extreme values that differ greatly from the other observations. OUTLIER if the values lie outside these specific ranges:if the values lie outside these specific ranges: Median – (1.5 • IQR)& Median + (1.5 • I |
| Quantitative Variables | Numerical variables that represent a measurable quantity |
| Residuals (error) | Represents unexplained (or residual) variation after fitting a regression model |
| Scatter plot | A graph in the coordinate plane representing a set of bivariate data |
| Second Quartile (Q2) | The median value in the data set |
| Third quartile | For a data set with median M, the third quartile is the median of the data values greater than M |
| Trend | A change (either positive, negative or constant) in data values over time |
| Spread | refers to the variability of the data. If the data cluster around a single central value, the spread is smaller. The further the observations fall from the center, the greater the spread or variability of the set. |