# Statistical Analysis

Statistical analysis topics of discussion

## China’s Slowing Growth

China’s growth at the weakest for 30 years, but exports back at pre-virus level   China’s Slowing Growth   China’s economy is set for a 2.2% raise this year; the weakest growth in almost 30 years. Although China (some may say has) emerged from the coronavirus pandemic in better shape than many. The recovery has, […]

## Sample testing when we don’t know the Population Standard Deviation

Sample Testing When We Don’t Know The Population Standard Deviation Its all well and good sample testing when we know the population standard deviation. But what about if we don’t have the ability to get production data, or we just have a small sample size? How to conduct sample testing when we don’t know the

## Calculating Hypothesis Test Statistics

In this blog post, we will continue our Hypothesis testing example and will be Calculating hypothesis test statistics. Lets actually work with some numbers! From our 3 previous blog posts: Creating a Hypothesis For Sample Testing Deciding the Correct Hypothesis Sample testing in China- hypothesis rules We have the following: Null hypothesis, H0= All bags

## Sample testing in China- hypothesis rules

Sample testing in China- Hypothesis Rules: In our previous blogs on sample testing, we discussed how we develop a hypothesis around a question and what the first 2 steps are in the process. You can find them here: Creating a Hypothesis For Sample Testing Deciding the Correct Hypothesis From the above, we developed the hypothesis:

## Deciding the Correct Hypothesis

Deciding the correct Hypothesis: In our previous post, we talked a lot about crisps. Walkers crips in fact. I would not recommend eating crisps, far too much salt, carbs and fat. But on a hot day, sitting in a beer garden, alongside a canal, the sun radiating down, there is nothing better than eating a

## Creating a Hypothesis For Sample Testing

In our last post, we discussed the importance of the Z score, how it helps us when sample testing components. In this blog post, we discuss creating a hypothesis for sample testing.  We should probably start at the beginning.  What is a Hypothesis Test?  A hypothesis is an idea or explanation that is proposed, the

## The Z score and How We Can Use it in Acceptance Sampling

The Z Score And How We Can Use It In Acceptance Sampling In our last blog post, we talked about how Standard deviation can allow us to understand if data points are away from the mean and by how much. In this post, we are going to discuss how we can calculate the Z score

## The Importance of sample size

We spoke in our past blog about what a sample is, and what are the best way of obtaining random sampling subgroups for testing. In this post, we will be discussing the importance of sample size.  Sample Size We briefly said in our previous post that Bigger = Better and this is the case. A

## How to choose a Sample for Statistical Analysis

Quality control is the ability to capture issues before they leave the factory and end up in your customers hands. Sample testing is the best technique to indicate if a shipment/ batch is acceptable or not. But how to choose a sample for statistical analysis let’s discuss how to choose components and understand if we

## How to Analyse Problems in Manufacturing Settings?

It’s an interesting concept; analysis. How often is it that we over, or under analyse something. We procrastinate, look too deeply or don’t look at an item at all. Sometimes you can be staring an issue in the face yet still not see the problem? Ever felt like this? If so, have a read on;