Scatter Plots Review

What is a scatter plot?

• A type of bar graph that displays data in rectangular bars.

• A graph that shows the relationship of two data sets.

• A circular chart divided into sectors to illustrate numerical proportions.

• A line graph that represents data points over time.

How can you approximate values from a scatter plot?

• By finding the corresponding point on the graph for a given value.

• By calculating the average of all points on the plot.

• By drawing a line through the points and estimating the value.

• By identifying the highest and lowest points on the plot.

What is the significance of outliers in a scatter plot?

• Outliers can indicate anomalies or special cases in the data.

• Outliers are always errors in data collection.

• Outliers have no impact on the overall data analysis.

• Outliers are the most common data points in a dataset.

How can you determine the trend of a scatter plot?

• By observing the direction of the points (upward, downward, or no trend).

• By calculating the mean of the data points.

• By identifying the outliers in the data set.

• By measuring the distance between the points.

What is an example of a positive correlation in real life?

• As study time increases, test scores tend to increase.

• As temperature increases, ice cream sales tend to decrease.

• As exercise frequency increases, weight tends to increase.

• As sleep duration increases, productivity tends to decrease.

What is the purpose of using scatter plots?

• To visually represent the relationship between two quantitative variables.

• To display categorical data in a bar format.

• To show the distribution of a single variable.

• To illustrate trends over time in a line format.

If a scatter plot shows a negative relationship, what does that indicate?

• As one variable increases, the other variable decreases.

• Both variables increase together.

• Both variables decrease together.

• There is no relationship between the variables.

What is the y-axis typically used for in a scatter plot?

• To represent the independent variable.

• To represent the dependent variable.

• To represent the correlation coefficient.

• To represent the mean value of the dataset.

What does it mean if a scatter plot has no association?

• Its ordered pairs have no predictable pattern.

• The data points form a straight line.

• The data points cluster around a central value.

• There is a strong correlation between the variables.

What does it mean if points on a scatter plot are tightly clustered?

• There is a strong correlation between the two variables.

• The variables are independent of each other.

• There is no correlation between the two variables.

• The data points are randomly distributed.