Bivariate Data

In a scatter plot, what does it mean if the points are very close to the regression line?

• The correlation is weak.

• The correlation is strong.

• There is no correlation.

• The variables are independent.

If a scatter plot shows a downward trend, what can be said about the correlation coefficient?

• It is positive.

• It is negative.

• It is zero.

• It is undefined.

Which of the following is NOT a characteristic of an outlier in bivariate data?

• It significantly deviates from the overall pattern of the data.

• It lies close to the regression line.

• It can affect the slope of the regression line.

• It can affect the correlation coefficient.

Which of the following best describes the concept of joint frequency in the context of bivariate data?

• The sum of all frequencies

• The frequency of occurrence of two categories together

• The highest frequency in the data set

• The average frequency of all data points

What does a scatter plot with points closely following an upward sloping line indicate about the relationship between the two variables being plotted?

• No correlation

• Negative correlation

• Positive correlation

• Constant correlation

If a scatter plot shows a random distribution of points with no discernible pattern, what type of correlation exists between the variables?

• Positive correlation

• Negative correlation

• No correlation

• Perfect correlation

How do you identify an outlier in a scatter plot?

• A point that lies on the line of best fit

• A point that is closer to the y-axis

• A point that is far removed from the cluster of other data points

• A point that is closest to the x-axis

What is the line of best fit in a scatter plot primarily used for?

• To separate different groups of data

• To predict the value of one variable based on the value of another

• To calculate the exact values of all data points

• To create a boundary around all data points

What does relative frequency tell you about bivariate data?

• The proportion of total instances that specific data points occur

• The total number of data points

• The difference between the highest and lowest values

• The correlation between variables

In a scatter plot, if the points are mostly clustered around a line that slopes downward from left to right, what type of correlation is indicated?

• Positive correlation

• Negative correlation

• No correlation

• Perfect correlation