Uploaded June 2012 | Updated September 2026, 1 hour ago
I work through a few word problems. For some the random variable has a binomial distribution, for others it does not. I hope to illustrate when the binomial distribution is appropriate, and when it is not. This video is inspired by the many times I've been asked something along the lines of "I don't understand when to use the binomial distribution".
I work through a few word problems. For some the random variable has a binomial distribution, for others it does not. I hope to illustrate when the binomial distribution is appropriate, and when it is not. This video is inspired by the many times I've been asked something along the lines of "I don't understand when to use the binomial distribution".



![Introduction to the t Distribution (non-technical)
A brief non-technical introduction to the t distribution, how it relates to the standard normal distribution, and how it is used in inference for the mean.
For those that use R, below are the R codes to find the values found in the video.
z value for a 95% interval:
qnorm(.975)
[1] 1.959964
t value for a 95% interval (5 DF)
qt(.975,5)
[1] 2.570582
t value for a 95% interval (10 DF)
qt(.975,10)
[1] 2.228139 Introduction to the t Distribution (non-technical)](https://i.ytimg.com/vi/Uv6nGIgZMVw/mqdefault.jpg)






