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Data Sheet Large Data Set, Summaries of Mathematics

Mathematics

What you need to be aware of for edexcel a level statistics.

Typology: Summaries

2022/2023

Uploaded on 01/29/2024

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mazzy-4 🇬🇧

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Large Data Set Cheat Sheet
Key Points
All cities/towns have data May-October 1987 and 2015 and no other months/years.
Foreign cities (Beijing, Jacksonville and Perth) have: Daily Mean Air Temperature, Rainfall (24 hour
total), Daily Mean Pressure (hPa), Daily Mean Wind Speed, Daily Mean Windspeed (Beaufort
conversion)
Perth is in winter in those months
British towns (others) have: Daily Mean Temperature (0900-0900) (°C); Daily Total Rainfall (0900-
0900) (mm); Daily Total Sunshine (0000-2400) (hrs); Daily Mean Windspeed (0000-2400) (kn); Daily
Mean Windspeed (0000-2400) (Beaufort conversion); Daily Maximum Gust (0000-2400) (kn); Daily
Maximum Relative Humidity (%); Daily Mean Total Cloud (oktas); Daily Mean Visibility (Dm); Daily
Mean Pressure (hPa); Daily Mean Wind Direction (o): Cardinal Direction; Daily Max Gust
Corresponding Direction (o); Cardinal Direction
Foreign Cities Measurements
Measurement type Key facts Beijing Jacksonville Perth
Daily Mean Air
Temperature
◦C, No missing data, 1dp Generally
around 10-30
Generally
around 18-30
Generally
around 10-20
Rainfall (24 hour
total)
Measured in mm, very often
0.0, no missing data,
negatively skewed, 1dp
Mostly 0.0 Mostly 0.0 Mostly 0.0
Daily Mean Pressure
(hPa)
hPa meants hectopascals,
always very close to 1000,
could easily be coded by
taking away 1000, no missing
data, whole numbers
990-1035 1010-1030 1005-1030
Daily Mean Wind
Speed
Units not stated (could be
knots), no 0s, no missing data,
1dp
Mostly 1-12 Mostly 3-15,
05/06/1987
was 17.1
Mostly 1-15,
10/10/1987
was 21.8
Daily Mean
Windspeed (Beaufort
conversion)
Based on Daily Mean Wind
speed (above):
0-10.9: Light
11-15ish: Moderate
15ish-: Fresh (not enough
data to know exact changing
point)
Nearly all light, only fresh
days overall are 10/10/1987
in Perth and 05/06/1987 in
Jacksonville
3 days
moderate and
the rest light
in 1987.
All days light
in 2015
1 day fresh, 2
days
moderate and
the rest light
in 1987.
1 day
moderate and
the rest light
in 2015
Around 10%
moderate in
1987, 1 day
fresh.
Around 10%
moderate in
2015, no
days fresh.
pf2

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Download Data Sheet Large Data Set and more Summaries Mathematics in PDF only on Docsity!

Large Data Set Cheat Sheet

Key Points

 All cities/towns have data May-October 1987 and 2015 and no other months/years.  Foreign cities (Beijing, Jacksonville and Perth) have: Daily Mean Air Temperature, Rainfall (24 hour total), Daily Mean Pressure (hPa), Daily Mean Wind Speed, Daily Mean Windspeed (Beaufort conversion)  Perth is in winter in those months  British towns (others) have: Daily Mean Temperature (0900-0900) (°C); Daily Total Rainfall (0900-

  1. (mm); Daily Total Sunshine (0000-2400) (hrs); Daily Mean Windspeed (0000-2400) (kn); Daily Mean Windspeed (0000-2400) (Beaufort conversion); Daily Maximum Gust (0000-2400) (kn); Daily Maximum Relative Humidity (%); Daily Mean Total Cloud (oktas); Daily Mean Visibility (Dm); Daily Mean Pressure (hPa); Daily Mean Wind Direction (o): Cardinal Direction; Daily Max Gust Corresponding Direction (o); Cardinal Direction

Foreign Cities Measurements

Measurement type Key facts Beijing Jacksonville Perth Daily Mean Air Temperature ◦C, No missing data, 1dp Generally around 10- Generally around 18- Generally around 10- Rainfall (24 hour total) Measured in mm, very often 0.0, no missing data, negatively skewed, 1dp Mostly 0.0 Mostly 0.0 Mostly 0. Daily Mean Pressure (hPa) hPa meants hectopascals, always very close to 1000, could easily be coded by taking away 1000, no missing data, whole numbers

Daily Mean Wind Speed Units not stated (could be knots), no 0s, no missing data, 1dp Mostly 1-12 Mostly 3-15, 05/06/ was 17. Mostly 1-15, 10/10/ was 21. Daily Mean Windspeed (Beaufort conversion) Based on Daily Mean Wind speed (above): 0-10.9: Light 11-15ish: Moderate 15ish-: Fresh (not enough data to know exact changing point) Nearly all light, only fresh days overall are 10/10/ in Perth and 05/06/1987 in Jacksonville 3 days moderate and the rest light in 1987. All days light in 2015 1 day fresh, 2 days moderate and the rest light in 1987. 1 day moderate and the rest light in 2015 Around 10% moderate in 1987, 1 day fresh. Around 10% moderate in 2015, no days fresh.

English Towns Measurement

Measurement Type Key Facts Daily Mean Temperature (0900-

  1. (°C) Generally 3-20, no missing data, 1dp Daily Total Rainfall (0900-0900) (mm) Often 0, lots of data written as tr (meaning trace), generally 0-40, negatively skewed, 1dp Daily Total Sunshine (0000-2400) (hrs) Generally 0-14, 01-17/05/1987 missing in all towns, 1dp Daily Mean Windspeed (0000-
  2. (kn) Generally 3-15, 01-17/05/1987 missing in all towns, whole number Daily Mean Windspeed (0000-
  3. (Beaufort conversion) 01-17/05/1987 missing in all towns, Based on Daily Mean Windspeed (0000-2400) (kn): 0-10 means light, 11-16 means moderate, 17+ means fresh. Mostly light and moderate, fresh very rare Daily Maximum Gust (0000-2400) (kn) 01-17/05/1987 missing in all towns, some other data missing in 1987 in some towns, generally 10-50, always bigger than Daily Mean Windspeed (0000-2400) (kn) where available, whole number Daily Maximum Relative Humidity (%) All data available, 75-100, mostly over 90, positively skewed, whole number Daily Mean Total Cloud (oktas) All data available, 0-8, whole numbers Daily Mean Visibility (Dm) All data available, 0-5000, in multiples of 100 Daily Mean Pressure (hPa) All data available, hPa meants hectopascals, always very close to 1000, could easily be coded by taking away 1000 Daily Mean Wind Direction (o) 10-360, evenly distributed, multiples of 10 Cardinal Direction Compass direction of Daily Mean Wind Direction (o) i.e. 270 is W. Up to three letters, e.g. W, SW or SSW Daily Max Gust Corresponding Direction (o) See Daily Mean Wind Direction (o), links to Daily Maximum Gust Cardinal Direction Cardinal Direction corresponding to Daily Max Gust Corresponding direction