Notes for Homework 12 and the link to the five British logicians

Notes on fractions to repeating decimals and vice versa

Notes on Roman numerals to Hindu-Arabic numerals and vice versa

Link to the biographies of Dodgson, Boole, Babbage, Lovelace and De Morgan

Notes for Homework 11

Notes for the chi square table: Confidence interval of a standard deviation and goodness of fit of a set of categories

Notes for Homework 10

Notes on hypothesis testing for two proportions

Notes on hypothesis testing for two averages - matched pairs and for separate, unrelated samples of the same measurement
 

Notes for Homework 9

Notes for the correction factor to approximate binomial distribution using normal distribution, z-scores and the green look-up table

Notes on t-scores, the yellow look-up table and hypothesis testing

Notes for Homework 7

Notes on t-scores

Notes on how to use the Population Pyramid website

Here are the cohort number for each gender and the total of the sexes from all the cohorts from 99 down. (The 100+ does not register at 0.1% for either males or females.) The cohorts in bold are the ones where the percentage is greater than the next youngest five year cohort.  If the birth rate about the same, you would expect that death rates would mean there would be less people in the 50-54 cohort than in the 45-49 group. In the United States, there was the big baby boom from 1945 through 1965. The last gasp of that increased birth rate is the reason the 50-54 cohort counts as a mode. We also had a smaller baby boom that ended in the past five years, the reason why the ages from 5-9 and 20-24 all count as modes. 

Cohort Male Female Total
95-99  0.0%  0.1%  0.1%
90-94  0.2%  0.4%  0.6%
85-89  0.5%  0.7%  1.2%
80-84  0.8%  1.1%  1.9%
75-79  1.2%  1.4%  2.6%
70-74  1.7%  2.0%  3.7%
65-69  2.4%  2.7%  5.1%
60-64  2.9%  3.1%  6.0%
55-59  3.4%  3.5%  6.9%
50-54  3.5%  3.5%  7.0%
45-49  3.2%  3.1%  6.3%
40-44  3.2%  3.2%  6.4%
35-39  3.1%  3.1%  6.2%
30-34  3.4%  3.5%  6.9%
25-29  3.5%  3.4%  6.9%
20-24  3.7%  3.5%  7.2%
15-19  3.3%  3.1%  6.4%
10-14  3.3%  3.1%  6.4%
05-09  3.3%  3.1%  6.4%
00-04  3.1%  3.0%  6.1%

Notes for Homework 6, Fall 2018

Link to the population pyramid website

Link to the New England Journal of Medicine page (click on the interactive graphic icon, needs Adobe Flash player)

Notes for Homework 5, Fall 2018

Notes on Bayesian method of probability

Practice for Bayesian and changing classic parimutuel to modern and vice versa

Expected value of a game
 

Notes for Homework 4, Fall 2018

Notes on the birthday problem

Notes on the Game Show Problem (a.k.a. the Monty Hall problem) all the way at the bottom of the post

Notes on missing a side effect in a study

Note on dependent probabilities for drawing cards from a deck without replacement
 

Notes for Homework 3, Fall 2018

Notes on contingency tables

Notes on the Central Limit Theorem

Notes on binomial distribution probabilities for series of independent trials
 

Notes for Homework 2, Fall 2018

Notes for computing standard deviation

Notes for using the look up table for proportions and z-scores

Second notes for proportions and z-scores

Notes for using the TI-30X-IIs to find standard deviation

Notes for Homework 1, Fall 2018

Notes for mean, median and mode

Notes for five number summary, IQR and the high and low thresholds

Notes for stem and leaf lists

Notes for frequency tables