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OFFICIAL A Level Maths Edexcel > Large Data Set > Flashcards

Large Data Set Flashcards

1
Q

Which months are included in the large data set?

A

May to October

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2
Q

Which years are included in the large data set?

A

1987 and 2015

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3
Q

Which cities are included in the large data set?

A

Leuchars, Leeming, Heathrow, Hurn, Camborne

Jacksonville, Beijing, Perth

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4
Q

Where is Leuchars?

A

East coast of Scotland. So northern hemisphere and near the sea

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5
Q

Where is Leeming?

A

North England, central. So northern hemisphere and not near the sea

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6
Q

Where is Heathrow?

A

South east England, not near the sea. Northern hemisphere

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7
Q

Where is Hurn?

A

South coast of England, central. Near the sea, northern hemisphere

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8
Q

Where is Camborne?

A

South West England. Cornwall area. Northern hemisphere, near the sea

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9
Q

Where is Jacksonville?

A

Northern Florida, east side. Near the sea, northern hemipshere

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10
Q

Where is Beijing?

A

Northern hemisphere. North east China. Not coastal

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11
Q

Where is Perth?

A

South west coast of Australia. Coastal. Southern Hemisphere

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12
Q

How many days are there in each of the months of the large data set?

A 
May 31
June 30
July 31
August 31
September 30
October 31
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13
Q

What are the weather variables?

A

Daily mean temperature
Daily total rainfall
Daily total sunshine
Daily mean windspeed, and Beaufort conversion
Daily maximum gust
Daily maximum relative humidity
Daily mean total cloud
Daily mean visability
Daily mean pressure
Daily mean wind direction, and Cardinal direction
Daily maxJust corresponding direction, and cardinal direction

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14
Q

What is the accuracy of daily mean temperature?

A

A tenth of a degree centigrade. Eg, 10.2

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15
Q

What is the accuracy of daily total rainfall?

A

Tenth of a mm. Eg, 1.4 mm

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16
Q

What is the accuracy of daily total sunshine?

A

Tenth of an hour. Eg, 12.3 hours

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17
Q

What is the accuracy for daily mean windspeed?

A

Nearest whole knot. Eg, 6 kn

18
Q

What are the values the Beaufort conversion (windspeed) can take?

A

Light, moderate, fresh (increasing windiness)

N/a

19
Q

What is the accuracy of daily maximum gust?

A

Nearest knot, eg 27 kn

20
Q

What are the units, and accuracy of daily maximum relative humidity?

A

Percentage, nearest percent. Eg, 67%

21
Q

What is the unit and accuracy for daily mean total cloud? What is the range of the unit?

A

Oktas. Nearest whole okta. Ranges from 0 to 8 oktas, so there are 9 possible values

22
Q

What is the accuracy for daily mean visibility? Units?

A

Nearest hundred decametres. Eg, 1500 Dm

23
Q

What is the accuracy and units of daily mean pressure?

A

Nearest whole hPa. Eg, 1017 hPa. Hectopascal. Hecto = 10^2

24
Q

What is the accuracy of daily mean wind direction?

A

Nearest 10°

Or for cardinal direction, up to 3 letters. Eg, both N and WNW are acceptable

25
Q

What is the accuracy for daily max gust corresponding direction?

A

Nearest 10°

Or for cardinal direction, up to 3 letters. Eg, both N and WNW are acceptable

26
Q

What is daily mean temperature? What does n/a mean for this variable?

A

The average of the hourly temperature readings during this period
N/a = not available

27
Q

What is daily total rainfall? What does tr and n/a mean for this variable?

A

It includes any solid precipitation, such as snow or hail, which is melted and measured in the same way as rainfall
tr = trace = amount less than 0.05 mm
N/a = not available

28
Q

What is daily maximum relative humidity?

A

The relative humidity is a measure of how close the air is to being saturated with water vapour. Relative humidities above 95% are associated with mist and fog

29
Q

1 knot = [ ] mph

A

1.15

30
Q

How is the daily mean wind speed calculated?

A

It is averaged over the 24 hours

31
Q

What is the daily maximum gust?

A

The Maximum instantaneous speed that occurred during the 24 hours

32
Q

How is daily mean wind direction are calculated?

A

It is averaged over the 24 hours

33
Q

What is the direction of the maximum gust?

A

The direction from which the wind was blowing when the maximum gust during the hour commencing at the time of entry occurred. Angle measured from true north

34
Q

In which locations, are the wind and gust direction also measured in cardinal directions, as well as degrees?

A

All the UK locations

35
Q

What is cloud cover?

A

The fraction of the celestial dome covered by cloud

36
Q

What is visibility defined as?

A

The greatest distance at which an object can be seen and recognised in daylight, or at night could be seen and recognised if the general illumination were raised the daylight level. Measured horizontally.

37
Q

What indicates that a value for visibility is not available?

A

A dash

38
Q

1 hPa = [ ] millibars

A

1

39
Q

Which variables do the foreign locations have data for?

A 
Daily mean air temp
Rainfall
Daily mean pressure
Daily mean windspeed
Windspeed (Beaufort conversion)
40
Q

When was the British hurricane?

A

15th/16th October 1987

OFFICIAL A Level Maths Edexcel (8 decks)

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