Clik here to view.
Excel statistical functions: AVERAGE
Excel has many statistical functions. Here is a description of one of the most commonly used: AVERAGE
View ArticleClik here to view.
Apparent puzzles with goodness-of-fit tests
Given two data sets it is a not unreasonable question to ask if they have similar distributions. For example, if we produce one data set of 500 numbers between 0 and 1, chosen uniformly and randomly...
View ArticleIndividual gain and engagement with mathematical understanding
My colleague Mercedes McGowen and I examined a measure of individual student gain by pre-service elementary teachers, related to Richard Hake’s use of mean gain in the study of reform classes in...
View ArticleClik here to view.
Coffee, Love and Matrix algebra – a review
Gary Ernest Davis Publisher: Republic of Mathematics Publication Date: 2014 Number of Pages: 389 Format: Paperback ISBN: 9780692262306 x x Reviewed by David A. Huckaby, on 11/12/2014 David A....
View ArticleClik here to view.
The number 3608528850368400786036725
Ben Vitale (@BenVitale) announced that 3608528850368400786036725 is a 25 digit number with the property that each number formed by its first n digits is divisible by n, for n from 1 through 25. How...
View ArticleClik here to view.
Data analysis: R functions for beginners
x What is a function, anyway? x For programming purposes, one should think of a function as a type of object that takes certain types of INPUTS, and – once those inputs are given – produces a definite...
View ArticleClik here to view.
Data analysis: is it easier in Mathematica® ?
I wrote a post yesterday on defining functions in R for beginners. By “beginners” I mean either people who are just learning R, or are just starting out in data analysis, or both. Today I want to show...
View ArticleClik here to view.
Data analysis for beginners: Box and whisker plots in R
John Wilder Tukey introduced a five-number summary of a data set in 1969 his book Exploratory Data Analysis. For a given data set, a five-number summary consists of: The median of the data The upper...
View ArticleClik here to view.
Clik here to view.
Codes for kids: Simple substitution ciphers
The idea of a simple substitution code Simple substitution ciphers substitute one letter of the alphabet for another, in some random arrangement. Here is an example of a simple substitution cipher: A →...
View Article
