Posts Tagged ‘ practicality ’

The Myth of Random Sampling

January 19, 2014
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The Myth of Random Sampling

I feel a slight quiver of trepidation as I begin this post – a little like the boy who pointed out that the emperor has  no clothes. Random sampling is a myth. Practical researchers know this and deal with it. … Continue reading →

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The Myth of Random Sampling

January 19, 2014
By
The Myth of Random Sampling

I feel a slight quiver of trepidation as I begin this post – a little like the boy who pointed out that the emperor has  no clothes. Random sampling is a myth. Practical researchers know this and deal with it. … Continue reading →

Read more »

Deterministic and Probabilistic models and thinking

December 16, 2013
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Deterministic and Probabilistic models and thinking

The way we understand and make sense of variation in the world affects decisions we make. Part of understanding variation is understanding the difference between deterministic and probabilistic (stochastic) models. The NZ curriculum specifies the following learning outcome: “Selects and … Continue reading →

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Deterministic and Probabilistic models and thinking

December 16, 2013
By
Deterministic and Probabilistic models and thinking

The way we understand and make sense of variation in the world affects decisions we make. Part of understanding variation is understanding the difference between deterministic and probabilistic (stochastic) models. The NZ curriculum specifies the following learning outcome: “Selects and … Continue reading →

Read more »

Those who can, teach statistics

September 29, 2013
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Those who can, teach statistics

The phrase I despise more than any in popular use (and believe me there are many contenders) is “Those who can, do, and those who can’t, teach.” I like many of the sayings of George Bernard Shaw, but this one … Continue reading →

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Statistics is not beautiful (sniff)

August 25, 2013
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Statistics is not beautiful (sniff)

Statistics is not really elegant or even fun in the way that a mathematics puzzle can be. But statistics is necessary, and enormously rewarding. I like to think that we use statistical methods and principles to extract truth from data. … Continue reading →

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The importance of being wrong

August 18, 2013
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The importance of being wrong

We don’t like to think we are wrong One of the key ideas in statistics is that sometimes we will be wrong. When we report a 95% confidence interval, we will be wrong 5% of the time. Or in other … Continue reading →

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A dearth of raw data

June 2, 2013
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A dearth of raw data

The desired outcome of this post is to be proved wrong. Here is my assertion: It is really difficult to find appropriate sets of data to use for teaching and assessing statistical analysis. This is a problem; one of the … Continue reading →

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Probability and Deity

May 26, 2013
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Probability and Deity

Our perception of chance affects our worldview There are many reasons that I am glad that I majored in Operations Research rather than mathematics or statistics. My view of the world has been affected by the OR way of thinking, … Continue reading →

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Teaching statistical report-writing

May 12, 2013
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Teaching statistical report-writing

Teaching how to write statistical reports It is difficult to write statistical reports and it is difficult to teach how to write statistical reports. When statistics is taught in the traditional way, with emphasis on the underlying mathematics the process … Continue reading →

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