Stats Large Data Set

Question 1

What does the data set consist of

Answer 1

Weather data samples provided by the ent office for five UK weather stations and three overseas weather stations in the time period October 1987 and may to October 2015

Question 2

What 5 weather stations in the UK

Answer 2

Camborne, Heathrow, Huron, Leeming and Leuchars

Question 3

What three locations over seas

Answer 3

Beijing, Jacksonville and Perth

Question 4

How many data variable are recorded across the weather stations

Answer 4

Eleven

Question 5

How are air temperatures recorded

Answer 5

By thermometers in a louvred screen 1.25m above short grass except some places where observations are made from a nonstandard roof top exposure

Question 6

What units are daily mean temperature recorded in

Answer 6

Degrees Celsius

Question 7

What is the daily mean air temperature

Answer 7

Average of the hourly temperature readings during this period

Question 8

When for daily mean air temperature

Answer 8

0900-0900 GMT

Question 9

What does the daily total rainfall refer to

Answer 9

24 hour periods commencing at 0900 GMT on the day of entry and included any solid precipitation such as snow or hail which is melted and measure the same was as rainfall

Question 10

What is daily total rainfall measure in

Answer 10

mm

Question 11

What does a trace or tr mean for daily total rainfall

Answer 11

Rain is an amount less than 0.05 mm

Question 12

How is daily total sunshine measured

Answer 12

By an instrument that measure the amount of solar radiation exceeding a threshold recorded in hours and tenths

Question 13

What’s daily maximum relative humidity

Answer 13

Measure of how close the air is to being saturated with water vapour

Question 14

Which Latrobe humidities are associated with mist and fog

Answer 14

Above 95%

Question 15

What is daily mean wind speed

Answer 15

Averaged over 24 hours from 0000GMT and given in knots ( 1 knot= 1.15 mph)

Question 16

What’s the daily maximum gust

Answer 16

Maximum instantaneous speed that occurred during the 24 hours

Question 17

What’s the daily mean wind direction

Answer 17

Averaged over 24 hours from 0000GMT on the date given in degrees /360

Question 18

What’s the daily maximum gust directions

Answer 18

Direction from which the wind was blowing when the maximum gust during the hour commencing at the time of entry occurred and is measured in degrees from true north

Question 19

What’s cloud cover

Answer 19

Fraction of the celestial dome covered by cloud measured in eighths (Oktas)

Question 20

What is visibility

Answer 20

Defined as 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 to daylight level

Question 21

How’s visibility measured

Answer 21

Using Visiometer at automatic sites but used to be done differently
Measured horizontally

Question 22

Units for visibility

Answer 22

Decametres (dam)

Question 23

What’s pressure measured with

Answer 23

Previously with the millibar but replaced by SI unit of pressure the pascal (Pa)