How do you check for autocorrelation in time series data?

by saspower | Mar 13, 2024 | SAS Online Course in India

Autocorrelation in time series data may be assessed using a variety of statistical approaches. The Durbin-Watson test is a typical method for determining the presence of first-order autocorrelation by examining the correlation of residuals at various delays. Another...

What influence do outliers have on a dataset?

by saspower | Mar 13, 2024 | SAS Online Course in India

Outliers can have a major influence on a dataset by distorting statistical measurements like the mean and standard deviation, resulting in erroneous representations of central tendency and variability. They can also skew correlation and regression studies, reducing...

What are the practical uses of linear and logistic regression?

by saspower | Mar 3, 2024 | SAS Online Course in India

Linear regression is used in a variety of sectors, including economics (predicting sales based on advertising spend), finance (predicting stock prices), and healthcare (predicting patient recovery time using a variety of criteria). Logistic regression, on the other...

What exactly is data visualisation, and what are the many types?

by saspower | Mar 2, 2024 | SAS Online Course in India

Data visualisation is the process of visually portraying data in order to effectively communicate insights and trends. Examples of data visualisations include:Scatter plots show connections between two variables.Bar charts are used to compare categorical data.Line...

What are the advantages of eliminating outliers from a dataset.

by saspower | Feb 27, 2024 | SAS Online Course in India

Removing outliers from a dataset has various advantages. For starters, it improves the precision and reliability of statistical studies by eliminating the distortion created by extreme numbers. This produces more robust and reliable outcomes, which improves the...