Unit 4 PT Trends

Front

What is a trend in the context of data analysis?

Back

A trend is a general direction in which something is developing or changing, often identified through patterns in data over time.

Front

Define 'PT' in the context of Unit 4 PT Trends.

Back

'PT' stands for 'Physical Training', which refers to the systematic practice of physical exercises to improve fitness and performance.

Front

What is the importance of identifying trends in data?

Back

Identifying trends helps in making informed decisions, predicting future outcomes, and understanding the underlying patterns in data.

Front

Explain the concept of 'data visualization'.

Back

Data visualization is the graphical representation of information and data, using visual elements like charts, graphs, and maps to make data easier to understand.

Front

What is a scatter plot and how is it used?

Back

A scatter plot is a graph that shows the relationship between two variables by displaying data points on a two-dimensional axis. It is used to identify correlations.

Front

Define 'correlation' in data analysis.

Back

Correlation is a statistical measure that describes the extent to which two variables change together, indicating the strength and direction of their relationship.

Front

What does a positive correlation indicate?

Back

A positive correlation indicates that as one variable increases, the other variable also tends to increase.

Front

What does a negative correlation indicate?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What is the purpose of a trend line in a graph?

Back

A trend line is used to represent the general direction of data points in a scatter plot, helping to visualize the trend and make predictions.

Front

Explain the concept of 'outliers' in data sets.

Back

Outliers are data points that differ significantly from other observations in a dataset, which can skew results and affect statistical analyses.