# Day 1

Today begins my phoenix-esque rebirth. A daily blog, this series will chronicle my path towards a dream score on the GRE.

Welcome to the journey.

**Math: ***Data Analysis.*

*Data Analysis.*

I began with section 4, data analysis. Basically, a look into describing past+present trends. An easier section, with some nuances.

**Key Definitions:**

**Variables**- factors that can vary for the population of focus. 2)**First Quartile-**1st group of the data from least (L) to Q1**Second Quartile-**2nd group of the data from Q1 to M (median)**Third Quartile**- 3rd group of the data from M to Q3**Fourth Quartile-**4th group of the data from Q3 to G (greatest)**Standard Deviation****-**How spread out numbers are from the mean.

**Tricky Concept- Slope**

The slope of this scenario is the, “ratio of change in finishing time to the change in training index.” In other words — the amount of minutes the finishing time is predicted to decrease with X additional units of training.

**Why is it tricky?: **It relies on a knowledge of the concept with some ratios, and a little coordinate geometry.

**How to remember?: **Think about what the X and Y axis say, then think about what would bring someone from left to right on that line.

**How to solve: **Pick two points on the line, e.g. (30,5) and (50,4.5)

**Vocabulary of the Day**

*Vocab, it makes me wanna dab™*

Ossify:harden. //As Lucas continued making futile attempts Kevin laugh, his opinion that Lucas wasn’t funny ossified.

Loath:reluctant. // Shalini was loath to leave the bed until the blanket was pulled away.

**Tomorrow: **4.3 Counting Methods, 4.4 Probability and Vocabulary with 10 Magoosh questions.

Thanks for stopping by, Shalini.