z-score – Oracle Tutoring, Campbell River, BC

Statistics: holiday weight gain: estimating percentage who don’t

By Jack Posted on January 15, 2016 Posted in lifestyle, statistics Tagged with holiday weight gain, normal distribution, percent of people who don't gain weight over the holidays, standard normal distribution, z-score

The tutor follows his earlier post with an implication about holiday weight gain. In yesterday’s post I discussed the surprise that perhaps mean holiday weight gain is no more than a pound; furthermore, I estimated its standard deviation at 3.125lbs. …

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Statistics: what is a z-score?

By Jack Posted on January 16, 2015 Posted in math, statistics Tagged with bell curve, mean, normal distribution, standard deviation, standard normal distribution, 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, …

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Tag: z-score

Statistics: holiday weight gain: estimating percentage who don’t

Statistics: what is a z-score?