## Introduction

Here are notes that I needed to write down for some of the Lab
Sessions. I was closer to a PC than my log book at the time, so I
wrote them on my web page!

## PC Lab Sessions

### 1A

- Mean
- 10.0498
- Standard Deviation
- 1.228575
- Minimum
- 7.422419
- Maximum
- 14.217

### 2A

- Radius of copper wire
- 0.005m ±

## Assessed Work

### Data points removed as obvious outliers

- Length = 0.721; R = 0.077; Mass = 1.016
- Length = 1.440; R = 0.237; Mass = 0.723
- Length = 1.024; R = 0.277; Mass = 0.723
- Length = 0.381; R = 0.298; Mass = 0.972

### Data points removed due to failing the ±3 standard residual test

- Length = 0.381; R = 0.298; Mass = 0.972

### Forcing line through the origin

I have decided to force the line through the origin because the
error in the y-intercept value (0.0649) is considerably larger than
the y-intercept itself (0.0099). This comparison is the standard
statistical method of deciding if a line should be forced through the
origin, as per Lab Session 2A.

### The Resistivity of Copper

The final gradient (R/L), as found by Excel: 0.219 ± 0.0012.

The radius of the copper wire, as calculated in Lab Session 2A: see above

R = p l/(πr^{2})

R/L × (πr^{2}) = p

...where R/L is the gradient. This gives

p = 1.72 × 10 ^{ -5 }