Large data set

Between which months is data collected?

May to October

What are the 2 years in which the data is collected?

2015

1987

Where are the 5 UK locations?

Leuchars

Leeming

Heathrow

Hurn

Camborne

Where are the 3 international locations?

Beijing

Perth

Jacksonville

What is daily mean air temperature measured in?

Degrees Celsius (⁰C)

What is daily mean rainfall measured in?

Millimetres (mm)

What does tr mean?

Trace of rain - less than 0.05mm

What is daily total sunshine measured in?

Hours (1d.p.)

How is daily maximum relative humidity displayed?

Given as a percentage to the nearest intiger

What value of daily maximum relative humidity is associated with mist and fog?

A reading above 95%

What is daily mean wind speed measured in?

Knots (nearest intiger)

What is 1 knot in mph?

1kn = 1.15mph

What are the different words, that are used to describe daily mean windspeed (Beaufort scale)?

Light

Moderate

Fresh

What is daily mean wind direction measured in?

Degrees rounded to the nearest 10

And is given a cardinal direction (e.g. N)

What is daily maximum gust measured in?

Knots

What is cloud cover measured in?

Oktas (eighths of sky covered by cloud)

What is daily mean visibility measured in?

Decametres (1Dm = 10m)

What is daily mean pressure measured in?

Hectopascals (1hPa = 100Pa = 1millibar)

Which locations are closest to the equator?

Jacksonville and Beijing

Which locations are near the coast?

Jacksonville, Perth, Camborne, Hurn and Leuchars

Which location(s) are in the southern hemisphere?

Perth - so has winter when we have summer

Which variables are discrete?

Cloud cover, daily mean wind direction, daily mean windspeed (Beaufort scale),

What significance did the storm in October 1987 in the UK have?

Skewed some variables (wind, gust, rainfall)

Mot much impact on sunshine and cloud cover, as in October UK is usually cloudy, with not much sunshine.

Which variables have lots of unknown data?

Daily total sunshine, mean windspeed and maximum gust - for 1987 in the UK

What do the 3 international cities contain data for?

Daily mean temperature

Daily total rainfall

Daily mean pressure

Daily mean windspeed

How should you clean data from the large data set?

Remove the tr values and n/a values