**Contingency tables and probabilities**

**Two points: Find slope, then the point-slope, then slope-intercept**

**Coin problems**

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#
Math for Liberal Arts

## Friday, March 24, 2017

## Thursday, March 16, 2017

## Wednesday, March 8, 2017

## Saturday, March 4, 2017

## Sunday, February 19, 2017

###
Notes for Homework 4, due Wed. Feb. 22

Because of the Monday holiday, homework is due on Wednesday. There will be no quiz this week.

**Notes on the Richter scale and bels and decibels, abbreviated B and dB.**

**Notes on square roots and the Pythagorean Theorem.**

## Friday, February 10, 2017

## Thursday, February 2, 2017

## Wednesday, January 25, 2017

## Monday, January 23, 2017

## Sunday, November 27, 2016

## Friday, November 18, 2016

###
Notes for homework of Tuesday Thursday class due Nov. 22

**Notes on frequency tables and the five number summary**

**Notes on frequency tables, ***n* (length of list) and sum(x)

**Notes on the shared birthday problem**

**Notes on binomial distributions (on our homework, making free throws) **

**Notes on using the normal distribution system (***z*-scores and look-up tables) to find the percentage between two *z*-score values **(on our homework, males listed at a certain height, on the website, females listed at a certain height. Only the ***mu* and *sigma* are different.)
## Thursday, November 10, 2016

###
Notes for Homework 10

I made a mistake labeling this homework assignment, calling it Homework 11. It is actually Homework 10 for the Tuesday-Thursday class.

These notes are from my statistics blog. The links contain a lot of information that we won't get to in Math for Liberal Arts. You should be able to search in your web browser for words like "mean", "median" and "mode", etc.

**Notes on mean, median and mode**

**Notes on the five summary and outliers**

**Notes on raw scores to ***z*-scores to proportions, also percentiles to *z*-scores to raw scores
## Tuesday, November 1, 2016

## Sunday, October 30, 2016

## Sunday, October 23, 2016

## Friday, October 14, 2016

## Thursday, October 6, 2016

## Tuesday, September 27, 2016

## Friday, September 23, 2016

## Thursday, September 15, 2016

## Wednesday, September 7, 2016

## Monday, August 29, 2016

## Wednesday, August 24, 2016

###
Notes for Homework 1

**Notes on rounding and rounding error with fractions.**

**Notes on binary and decimal representation of numbers.**

**Notes on rounding to significant digits. **

The link to rounding to significant digits deals with rounding a number great than 1. For example 2^16 = 65,536.

** **

65,536 rounded to one significant digit = 70,000

65,536 rounded to two significant digits = 66,000

65,536 rounded to three significant digits = 65,500

Let's consider rounding a number less than 1.

2^(-16) = 0.000015258789...

If we were asked to round this to the nearest thousandth, we would get 0.000. It's never a good idea to round a number that isn't zero to zero. Doing this means we aren't thinking at the right scale. Rounding to significant digits ensures we will never round a non-zero number to zero.

0.000015258789... rounded to one significant digit = 0.00002

0.000015258789... rounded to two significant digits = 0.000015

0.000015258789... rounded to three significant digits = 0.0000153

In most cases except scientific papers, rounding to three significant digits is considered sufficient.

## Monday, August 22, 2016

###
Important dates for Fall 2016

**Add and drop dates**

Last day to add: Sunday, September 4

Last day to drop class without a "W": Sunday, September 4

Last date to drop class with a "W": Friday, November 8

**Holidays**

Labor Day: Monday, September 5

Thanksgiving: Thursday, November 24

**Test dates for Monday-Wednesday class**

Midterm 1: Wed., Oct. 5

Midterm 2: Wed., Nov. 9

Comprehensive Final: Wed, Dec. 14**8:00-10:00 am (note time change)**

**Test dates for Tuesday-Thursday class**

Midterm 1: Thurs., Sept. 29

Midterm 2: Thurs, Nov. 3

Comprehensive Final: Tues., Dec. 13 (normal class period)
## Tuesday, July 26, 2016

## Saturday, July 23, 2016

## Tuesday, July 19, 2016

## Friday, July 15, 2016

## Wednesday, July 13, 2016

## Saturday, July 9, 2016

## Special posts

## About Me

## Labels

Online notes for Math 15, Math for Liberal Arts taught in the Fall 2016 semester at Laney College by Prof. Hubbard.

Because of the Monday holiday, homework is due on Wednesday. There will be no quiz this week.

I made a mistake labeling this homework assignment, calling it Homework 11. It is actually Homework 10 for the Tuesday-Thursday class.

These notes are from my statistics blog. The links contain a lot of information that we won't get to in Math for Liberal Arts. You should be able to search in your web browser for words like "mean", "median" and "mode", etc.

The link to rounding to significant digits deals with rounding a number great than 1. For example 2^16 = 65,536.

65,536 rounded to one significant digit = 70,000

65,536 rounded to two significant digits = 66,000

65,536 rounded to three significant digits = 65,500

Let's consider rounding a number less than 1.

2^(-16) = 0.000015258789...

If we were asked to round this to the nearest thousandth, we would get 0.000. It's never a good idea to round a number that isn't zero to zero. Doing this means we aren't thinking at the right scale. Rounding to significant digits ensures we will never round a non-zero number to zero.

0.000015258789... rounded to one significant digit = 0.00002

0.000015258789... rounded to two significant digits = 0.000015

0.000015258789... rounded to three significant digits = 0.0000153

In most cases except scientific papers, rounding to three significant digits is considered sufficient.

Last day to add: Sunday, September 4

Last day to drop class without a "W": Sunday, September 4

Last date to drop class with a "W": Friday, November 8

Labor Day: Monday, September 5

Thanksgiving: Thursday, November 24

Midterm 1: Wed., Oct. 5

Midterm 2: Wed., Nov. 9

Comprehensive Final: Wed, Dec. 14

Midterm 1: Thurs., Sept. 29

Midterm 2: Thurs, Nov. 3

Comprehensive Final: Tues., Dec. 13 (normal class period)

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- 100 coins
- all factors
- angles and sides
- area of a triangle
- binary
- biographies
- bitwise operators
- classification of three vertex triangle
- classification of triangles
- compound interest
- computer science
- conditional probability
- Consumer Price Index
- contingency tables
- corrections
- decibel and bel scale
- decimal
- decimals
- distance
- divisibility
- effective interest rates
- Finding the square root of any number
- five number summary
- fractions
- geometry
- half life
- Heron's formula
- hexadecimal
- homework answers
- Important class dates Fall 2016
- inclusion-exclusion rule
- interest and loans
- linear equations
- logarithms
- logic
- Math history.
- metric system
- numbers and representation
- old school
- order of operations
- outliers
- overflow
- percents
- Polish notation
- powers of 10
- practice
- practice problems
- prime factorization
- prime numbers
- probability
- probability based on contingency tables
- Pythagorean theorem
- regular polygons
- repeating decimals and fractions
- Richter scale
- Roman numerals
- rounding
- scales based on powers of 10
- scientific notation
- scientific notation notes
- set theory
- significant digits
- simultaneous equations
- slope
- square roots
- statistics
- syllabus
- three dimensional geometry
- tilings of the plane
- time
- triangle inequality
- truth tables.
- underflow
- Venn diagrams
- weights and measures
- z-scores