This video will explain what the heck this thing is.. how it is formed... and why these "sampling distributions" are normalish, even when the population is bimodal

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MrNystrom

Stuck on standard deviation?? This video will help you understand what that crazy formula really says.. Watch a few times if necessary... "THE AVERAGE DISTANCE TO THE MEAN!!" *sort of... How to think of this measure of spread...

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MrNystrom

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MrNystrom

Discussion about the p value... what it means and how to interpret it. If the null were true! reject or fail to reject?

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MrNystrom

Disjoint or independent ? This video discusses both.

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MrNystrom

Discussing or, adding and general addition

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MrNystrom

How should you interpret R squared? what does it really tell us?
this video should help

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MrNystrom

What is a sampLING distribution? It is a distribution of a bunch of p-hats or x-bars... watch and see

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MrNystrom

Quick intro to the course. Quick discussion on important vocabulary that we will use throughout the year. Inferential vs. Descriptive...
Statistics, Population, parameter, sample, statistic, census

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MrNystrom

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MrNystrom

Here is a confidence interval review.

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MrNystrom

How to build a normal model by using the EMPIRICAL RULE... How to actually construct a model that can be used to answer LOTS of questions

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MrNystrom

Walking through the general multiplication rule

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MrNystrom

A basic intro to probability and notation

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MrNystrom

Often you are asked the likelihood of getting some proportion of your sample to have some characteristic when you know the proportion of the population who have that characteristic.. here is a cheezy example.

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MrNystrom

How do you calculate a redisual?
How do you find an actual value given the residual?
What is a residual?

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MrNystrom

How do you go from %ile to Z, or from Z to %ile? use the 2 functions on your calculator!!!!
Do you like my "karate CHOP!!" pose????

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MrNystrom

Quick intro to regression. How to make scatter plot on TI 83 84 89. Describing scatterplots (strength form direction strange stuff)...

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MrNystrom

Looking at the logic of 1 proportion z tests. You can do it in 3 easy steps.. the key to understanding is drawing the null model.

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MrNystrom

perfect squares dude! you can do it!
-mr nystrom

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MrNystrom

Looking a bit into Frequency, relative frequency, cumulative frequency, relative cumulative frequency, dot plot, histogram....

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MrNystrom

How do you go from a data value to a z score or from a z score to a data value?? USE THE Z SCORE FORMULA

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MrNystrom

This video gives you a nice way to think about box and whisker plots. Please remember that you can never tell what is happening within the quartiles, but you can get a general feel... Box and whiskers are used to compare many distributions on the same axes. Seldomly would you use one to describe a single distribution.... GOOOD LUCK

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MrNystrom

How can you tell if 2 variables are independent or associated by simply looking at a contingency table? Here's how... (you need to do a little math...)

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MrNystrom

I hope to help you understand why there are 2 formulas for the SD. They are bith trying to do the same thing..

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MrNystrom

Where does the correlation coefficient, r, come from? This video explains how it is calculated and gives a brief example of a hand calculation. There are many other formulas that you can use to calculate r, some are actually easier than this, however, I feel that this formula is the best for understanding where the r value comes from.... You will always use technology to find this value, but it is nice to know where it comes from....

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MrNystrom

Just some step by step directions about how do to some regression stuff on your TI !!!

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MrNystrom

Here we visualize 2 ways to "see" pi.

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MrNystrom

What is a confidence interval? It is a guess, and educated one. It is a "parameter catcher" and you hope to catch the true parameter.. but you never know if you actually did, because you don't know which p-hat you randomly got!!!

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MrNystrom

what is the r value? the correlation coefficient? Here is a quick explanation of the r value and what it means.. How to find r value and equation on TI 84 83 89 .. r value basics

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MrNystrom

Similar to sampling distribution for sample proportions. This video shows the relationship between the normal approx of the binomial and the sampling distribution of sample proportions. One (bino) is the distribution of the number of successes in a bunch of random samples, the other (p-hats) is the distribution of the proportions of successes in a bunch of random samples.

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MrNystrom

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MrNystrom

polynomial monomial? nice
FIND MY MISTAKE!!!!!

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MrNystrom

two more approaches to factoring. Many students find this (the second method) the simplest way..

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MrNystrom

Look for the right groups, move aroung the terms!

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MrNystrom

Where do these formulas come from??? What do they mean???

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MrNystrom

Weight limit problems, how likely to go over the limit with n people??

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MrNystrom

More Confidence intervals.. this one focuses on z crit

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MrNystrom

What are these conditions and why do we have to meet them????

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MrNystrom

Given the summary stats, how can you use the formulas to make an equation (a model)?
Also... what does that r Sy / Sx mean???

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MrNystrom

Grouping Symbols, What are they?
Check it out....

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MrNystrom