CI Formulas
There are two formulas we use when we are computing the confidence interval. One is used when we […]
interval
Interpreting Confidence Intervals
Confidence intervals are often misunderstood. Let’s use an example. You have a population of oak trees in your […]
Allocate Data into Buckets or Groups
Suppose we have a table of data that lists employees and their annual salaries. We want to create […]
CI for Predicting Sales
We are finding that we have too many products on our shelves and some of the products aren’t […]
CI Population Unknown and Equal
The previous series of posts was called Inferential Statistics. Let’s now compare “apples to apples”. Last time we […]
CI Independent Samples
Let’s work with confidence intervals with two means and independent samples. Let’s work with data where we know […]
CI for Two Populations
What if we had two populations to consider? So far we’ve been looking at single populations. In some […]
CI Population Variance Known
Suppose we have a sample of salaries for a job title and we know the population’s variance. In […]
Student’s T Distribution
The Student’s T-distribution is one of the most important breakthroughs in statistics, as it allowed inference through small […]
Confidence Intervals Introduction
Series of Posts This post is the first part of a series of posts called Statistics Confidence Intervals […]
Relationships and the Data Story
When we describe and present the data we are telling a story or narrative. Quantitative stories are always […]
Statistics Introduction
Series of Posts This post is the first part of a short series of posts called Statistics. You […]