Dataset Info

This is a list of what all the variables are and where the dataset is from for the built in datasets on NZGrapher. You can always load your own data, or have a school folder with data that your school has uploaded.

Babies 

The data on 189 births were collected at Baystate Medical Center, Springfield, Mass. during 1986. The goal of this study was to identify risk factors associated with giving birth to a low birth weight  baby (weighing less than 2500 grams). Data was collected on 189 women, 59 of which had low  birth weight babies and 130 of which had normal birth weight babies.

Variable 

Description

LowBirthWeight 

No = Birth Weight >= 2500g 

Yes = Birth Weight < 2500g

MothersAge 

Age of the Mother in Years

Race 

Race of the mother

MotherSmoke 

Smoking Status During Pregnancy

FTV 

Number of Physician Visits During the First Trimester

BirthWeight 

Birth Weight in Grams

Ball Wear 

Data was recorded of students going to the school ball in 2012 as to how much they spent on  their clothing and accessories. 

Variable 

Description

Gender 

Boy = new student is male 

Girl = new student is female

Amount.spent 

The amount spent on clothing and accessories in New Zealand Dollars.

Cars 

With rising costs of owning and running a car, and environmental awareness, buyers are  becoming more conscious of the features when purchasing new cars. The data supplied is for  new vehicles sold in America in 1993. 

Variable 

Description

Vehicle Name

 

Origin 

Country of manufacture 

· America 

· Foreign

Price 

US $1000

Type 

Small, midsize, large, compact, sporty, van

City 

City MPG (miles per gallon by EPA rating)

OpenRoad 

Highway MPG

Drive Train 

Front Wheel Drive 

Rear Wheel Drive

Engine Size 

Size in litres

Manual Transmission 

Yes 

No

Weight 

Weight of car in Kg

Diamonds 

Every diamond is unique, and there are a variety of factors which affect the price of a diamond.  Insurance companies in particular are concerned that stones are valued correctly. Data on 236 round diamond stones was collected from a Singapore based retailer of diamond  jewellery, who had the stones valued.

Variable 

Description

Carat 

Weight of diamond stones in carat units 1 carat = 0.2 grams

Colour 

Numerical value given for quality of colour ranging from 1=colourless to 6=near  colourless

Clarity 

Average = score 1, 2 or 3 

Above average = score 4, 5 or 6

Lab 

Laboratory that tested & valued the diamond 

1 = laboratory 1 

2 = laboratory 2

Price 

Price in US dollars

Empty Dataset for Editing 

This is a blank dataset designed for entering experimental data. 

Kiwi 

A sample of kiwi birds around New Zealand was collected in order to help with conservation  efforts. The original data is from:http://www.kiwisforkiwi.org/ and was sourced from the secondary  school guides (http://seniorsecondary.tki.org.nz/Mathematics-and-statistics/Achievement objectives/AOs-by-level/AO-S7-1) 

Variable 

Description

Species 

GS-Great Spotted 

NIBr-NorthIsland Brown 

Tok-Southern Tokoeka

Gender 

M-Male 

F-Female

Weight(kg) 

The weight of the kiwi bird in kg

Height(cm) 

The height of the kiwi bird in cm

Location 

NWN-North West Nelson 

SF-South Fiordland 

CW-Central Westland 

N-Northland 

EC-Eastern Canterbury 

E-East North Island 

StI-Stewart Island 

W-West North Island

NF-North Fiordland 

Teachers note: this is a synthesised dataset based on real data. At the time of creating the data  set there were around 25,000 brown, 17,000 great spotted and 34,500 southern tokoeka. These  numbers formed the basis of the data set, but instead of being out of around 76,000 the data set  contains around 700 birds. 

The data was generated using the population parameters, including gender, location, height,  weight and species in Fathom. The size of the population was so that it was too big to use all the  data (when doing by hand) but not too big that it couldn’t be created for students to use as a  “population” to sample from. 

Marathon 

The data is a sample taken from marathons in NZ. 

It is a simple random sample of 200 athletes.

Variable 

Description

Minutes 

How many minutes they completed the marathon in

Gender 

Male (M) or Female (F)

AgeGroup 

Younger (under 40) or older (over 40)

StridelengthCM 

The persons average stride length over the marathon in cm.

Rugby 

The data is real data and comes from http://www.rugby-sidestep-central.com/ 

Variable 

Description

Country 

New Zealand or South Africa

Position 

Forward or Back

Weight 

The weight of the player in kilograms (kg)

Height 

The height of the player in metres (m)

Sharks 

The data is real and comes from the MPI centralised observer database:  

http://www.fish.govt.nz/minz/Research+Services/Research+Database+Documentation/Cod/default.htm 

Variable 

Description

Calendar Year 

Year which the data was recorded in

Fish Sex 

The gender of the shark

Total Length 

The total length of the shark measured in centimetres

Fork Length 

The fork length of the shark measured in centimetres

Sports Science 

The data is real data and comes from http://www.statsci.org/data/oz/ais.html The data set provides information about 102 male athletes and 100 female athletes at the  Australian Institute of Sport. 

Variable 

Description

Sex 

male or female

Sport 

sport played

Ht 

height in cm

Wt 

weight in kg

LBM 

lean body mass in kg

%Bfat 

% body fat

BMI 

body mass index (weight/height2)

RCC 

red blood cell count

WCC 

white blood cell count

Hc 

haematocrit

Hg 

haemoglobin

Ferr 

plasma ferritin concentration

SSF 

sum of skin folds

Teachers note: this is the dataset used in the TKI Exemplar A

TS Note 

All datasets prefixed with a TS that are preloaded in NZGrapher are time series datasets, and not  particularly well suited to bivariate or multivariate analysis. 

TS - Births and Deaths 

Data on the number of births and deaths in New Zealand. 

The data is sourced from Statistics New Zealand. 

Variable 

Description

Quarter 

Quarterly

Male Live Births 

Number of males born during the quarter

Female Live Births 

Number of females born during the quarter

Male Deaths 

Number of male deaths during the quarter

Female Deaths 

Number of female deaths during the quarter

TS - Forestry 

The volume of wood removed from different types of forests in New Zealand. The data is sourced from the Ministry for Primary Industries. 

Variable 

Description

Quarter 

Quarterly

Natural Forests 

The volume of wood removed from Natural Forests in millions of m3

Plantation Forests 

The volume of wood removed from Plantation Forests in millions of m3

TS - Imports 

Information on imports to and from New Zealand. The data is sourced from Statistics New Zealand. 

Variable 

Description

Month 

Monthly

TotalAirportsCIF 

Cost, insurance and freight of imported goods in NZ$(000)

TotalParcelPostCIF 

Cost, insurance and freight of imported goods in NZ$(000)

TotalSeaportsCIF 

Cost, insurance and freight of imported goods in NZ$(000)

TotalAirportsWeight 

Weight of imported goods in tonnes

TotalParcelPostWeight 

Weight of imported goods in tonnes

TotalSeaportsWeight 

Weight of imported goods in tonnes

TS - Jobs 

The number of people in employment in New Zealand. The data is sourced from Statistics New Zealand.

Variable 

Description

Month 

Monthly

Total Filled Jobs 

The number of jobs that are filled in millions

NZ Population 

The population of New Zealand in millions

TS - Penguin 

Data on the number of penguins at the Phillip Island Penguin Parade in Australia. This data was created by a teacher on her return from Philip Island and should not be considered  *real* but is still useful for teaching and learning. 

Variable 

Description

Month 

Monthly

Number 

The number of penguins in the colony

TS - Sea Ice 

The data is the surface area of sea ice in millions of square kilometres. 

The data is sourced from the National Snow and Ice Data Center. 

Variable 

Description

Time 

Monthly

Arctic 

Million Square Kilometres of Ice in the Arctic

Antarctica 

Million Square Kilometres of Ice in Antarctica

You can find some more info about the different measurements used to calculate sea ice and  why the numbers in the different versions are different here

The April 2017 data was sourced from http://www.climate4you.com/SeaIce.htm Others have been shared with me from various people directly from NSIDC 

TS - Sunglasses 

Data on the value of sunglasses sold. 

Variable 

Description

Quarter 

Quarterly

Sales 

Amount of sales in thousands of dollars

TS – Temperatures Auckland 

Temperature data from the weather station at Auckland Airport sourced from NIWA.

Variable 

Description

Month 

The Month of the Data

Tmax 

Average Maximum Temperature for the Month

Tmin 

Average Minumum Temperature for the Month

TS - Visitors 

The visitors’ dataset is the number of people entering New Zealand on a Visitor Visa from Australia,  China, Japan and the UK. 

The data is sourced from Statistics New Zealand. 

Variable 

Description

Date 

Quarterly

Australia 

Number of visitors in the quarter from Australia

China, People's Republic of 

Number of visitors in the quarter from China

Japan 

Number of visitors in the quarter from Japan

United Kingdom 

Number of visitors in the quarter from the UK

The updated version April 2020 also includes: 

Variable 

Description

Korea, Republic of 

Number of visitors in the quarter from Korea

Germany 

Number of visitors in the quarter from Germany

Canada 

Number of visitors in the quarter from Canada

United States of America 

Number of visitors in the quarter from USA

Total All Countries 

Total Visitors to New Zealand

Extra Notes: 

Data is derived from a sample of records and hence may contain sample error. Caution should  be used when using data with low cell values. 

Visitor arrivals are overseas residents arriving in New Zealand for a stay of less than 12 months. For arrival series, the country of residence is the country where a person last lived for 12 months or  more (country of last permanent residence). 

For detailed metadata about countries used in International Travel and Migration statistics, see DataInfo+ http://ow.ly/Mm9ba 

Temperatures - Auckland 

Temperature data from the weather station at Auckland Airport sourced from NIWA. Each row is  one day.

Variable 

Description

Month 

Month Number (1 = Jan, 2 = Feb, etc.) from which the temperature was collected

Decade 

Decade from which the temperature was collected

Tmax(C) 

Maximum Temperature on the Day

Tmin(C) 

Minimum Temperature on the Day