## Standard deviation: a forestry example

The tutor offers a case study in statistics. Around here, forestry might be the leading industry.  Of course, I hardly ever see evidence of it; up in the hills is where the work is done. As I understand, one angle …

## Statistics: what is a z-score?

Tutoring some high school math courses, statistics is prominent.  The tutor introduces an important definition.   Statistics focuses on the mean and the standard deviation. But why is that? The reason is that while most phenomena follow a normal distribution, …

## Statistics: the meaning of mean and standard deviation

Tutoring math, you get asked about statistics.  The tutor offers an interpretation of mean and standard deviation. Back when I was in university, there was a 2nd-year statistics course. It was the introductory stats course and was required for many …

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## Math: a mean question

Continuing from last post, the tutor gives an example of a question involving the mean. You will often find a question such as this on a qualifying exam: Bill writes six math tests. They all have equal weighting towards his …

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## Mean, median, and mode

Tutoring high school math, you deal with introductory statistics.  The tutor introduces measures of central tendency. Let’s imagine you have the following seed counts from eleven different apples: 15 9 8 10 8 10 8 5 7 14 12 We …

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