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...

What are some instances of trends and seasonal patterns in time series data?

by saspower | Feb 25, 2024 | SAS Online Course in India

Trends in time series data show long-term changes or patterns over time, such as increasing or decreasing values. Examples include population growth, stock market trends, or climate change. Seasonality refers to recurring patterns that follow a specific time frame,...