Reading scatterplots, calculating measures of center, and interpreting two-way tables as tested on the SAT math section.
34 cards · basic cards · AI-written, checked twice. Edit anything.
- What does a positive correlation in a scatterplot mean?
- As x increases, y tends to increase; points trend upward from left to right.
- What does a negative correlation in a scatterplot mean?
- As x increases, y tends to decrease; points trend downward from left to right.
- What does it mean if a scatterplot shows no correlation?
- There is no clear linear pattern; the points are scattered randomly with no upward or downward trend.
- What is an outlier in a scatterplot?
- A point that does not fit the general pattern or trend of the rest of the data.
- What is the line of best fit in a scatterplot?
- A straight line that best represents the trend of the data by minimizing the distance from points to the line.
- How do you determine if a correlation is strong or weak in a scatterplot?
- Strong correlation: points cluster tightly around the line of best fit. Weak correlation: points are more spread out from the line.
- In a scatterplot, what does the x-axis represent and what does the y-axis represent?
- The x-axis is the independent variable (horizontal). The y-axis is the dependent variable (vertical).
- What is interpolation in the context of a line of best fit?
- Using the line of best fit to predict a value within the range of the data.
- What is extrapolation in the context of a line of best fit?
- Using the line of best fit to predict a value outside the range of the data.
- How do you read a coordinate point from a scatterplot?
- Start at the point, go straight down to the x-axis to find the x-value, then go straight left to the y-axis to find the y-value. The coordinate is (x, y).
- What is the mean of a data set?
- The average; the sum of all values divided by the number of values.
- What is the median of a data set?
- The middle value when data is arranged in order from least to greatest. If there is an even number of values, the median is the average of the two middle values.
- What is the mode of a data set?
- The value that appears most frequently in the data set.
- What is the range of a data set?
- The difference between the greatest and least values; range = maximum - minimum.
- What is standard deviation?
- A measure of how spread out the data is from the mean; a larger standard deviation means data is more spread out.