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.

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. 

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. 

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.

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) 

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.

Rugby 

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

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 

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. 

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. 

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. 

TS - Imports 

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

TS - Jobs 

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

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. 

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. 

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 main datasets folder now only contains the most recent sea ice dataset. To access historical ones go to: https://grapher.nz/?folder=seaice

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.

More or Less did a 9 minute podcast about this in 2024 which provides a lot of interesting insights into the data: https://www.bbc.co.uk/programmes/w3ct5b7w

TS - Sunglasses 

Data on the value of sunglasses sold. 

TS – Temperatures Auckland 

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

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. 

The updated version April 2020 also includes: 

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.