Statistics Final exam Semester 1 2024-2025

Front

What is the equation of a linear regression model?

Back

Front

How do you estimate the correlation coefficient?

Back

Front

What is joint relative frequency?

Back

Joint relative frequency refers to the proportion of observations that fall into a specific category for two variables. It is calculated by dividing the joint frequency by the total number of observations.

Front

How do you identify an outlier in a data set?

Back

An outlier is a data point that is significantly different from other observations. It can be identified using methods such as the interquartile range (IQR) or standard deviation.

Front

What is the formula for calculating probability?

Back

Front

What is the difference between marginal and conditional relative frequency?

Back

Marginal relative frequency refers to the total frequency of a single category, while conditional relative frequency refers to the frequency of a category given a specific condition.

Front

What does a correlation coefficient of 0.8 indicate?

Back

A correlation coefficient of 0.8 indicates a strong positive linear relationship between two variables.

Front

What is the significance of the slope in a linear regression equation?

Back

The slope in a linear regression equation indicates the change in the dependent variable for each one-unit change in the independent variable.

Front

How do you calculate the mean of a data set?

Back

Front

What is the purpose of a scatter plot in statistics?

Back

A scatter plot visually represents the relationship between two quantitative variables, helping to identify patterns, trends, and potential correlations.