Large Data Sets

The large data set records information about the ____ between the months of ____ and _____ in the years ___and ____

The large data set record information about the WEATHER between the months of MAY and OCTOBER in the years 1987 to 2015

The large data set records information about 888 locations. Which of the UK locations is the furthest north?

Leuchars

The large data set records information about 8 locations. The locations in the UK are:

Leuchars

Leeming

Heathrow

Hurn

Camborne

The non-UK locations are ____Australia, ____USA, and ____

China.

Perth Australia, Jacksonville USA, Beijing China

In how many locations was temperature recorded in our large data set?

8

The large data set records…

the mean temperature each day between 9am on one day and 9am on the next.

Bob thinks that climate change might be causing temperatures to increase.
To what extent does the large data set support his theory?

Mean annual temp increases from 1987 to 2015 in every city, apart from in Perth. Therefore, the majority of the data supports his theory with only one exception.

What unit of measurement does the Met office use to measure pressure?

Hectopascals

1 hectopascal is equal to…

100 pascals

1 millibar

1 millimeter of rainfall is equal to how many litres of water?

1L

For UK locations, amounts of rainfall (r) are sometimes recorded as ‘tr’.
This stands for the word _____

trace

‘tr’ is used when the amount of rainfall is…

0 mm<r<0.05 mm

As a consequence of using ‘tr’…

some statistical measures - like the mean, or standard deviation - may be less accurate

it is more difficult to compare UK and non-UK rainfall data.

What factors do all 8 locations measure?

Temperature

Pressure

Rainfall

Windspeed

The Met office measures both wind speed and gust speed in _____
It also converts these wind speeds to the ____scale.

The Met office measures both wind speed and gust speed in knots. It also converts these wind speeds to the beaufort scale.

What units of measurement does the Met office use to measure mean wind speed?

Knots or Beaufort scale

What type of variable is wind measured with, according to the beaufort scale?

Discrete - Discrete data can only take certain values and this is the case for the beaufort scale.

What unit of measurement does the Met office use to measure max gust speed?

knot

A wind speed of 18 knots belongs to which of the following categories in the beaufort scale?

Fresh wind- The Beaufort scale used in the large data set, has three different categories:
Light wind, moderate wind and fresh wind. Fresh wind is described as encompassing wind speeds of 17 and 21 knots, therefore a wind speed of 18 knots is described as a fresh wind.

Moderate wind encompasses which range of wind speeds?

Moderate wind is described as encompassing wind speeds of 11 and 16 knots.

1 knot is approximately ____ mph

1.15mph

A statistician calculates the mean annual wind speed for Beijing and for Heathrow. Which mean is more accurate?

Beijing- non-UK locations round to 1 decimal place, whereas UK locations round to the nearest integer. 1 decimal place is more accurate than an integer, so the resulting mean will be more accurate for non-UK location.

Gust speeds are recorded...

Gust speeds are only recorded within the UK, since gust speeds are rounded to the nearest integer.

Define total rainfall and provide its units.

• Measured in mm

• tr/trace means less than 0.05mm, can be treated as 0 in calculations

Define mean wind speed and provide its units.

• Kn/knots ‘nautical mile per hour’

  • Windspeed is also given on the Beaufort scale

What are the categories of the Beaufort scale?

• 0= Calm <1kn

• 1-3=Light 1-10 Kn

• 4= Moderate 11-16Kn

• 5= Fresh 17-21 Kn

Define Mean Visibility and its units.

• In meters

  • How far can be seen into the horizon during daylight hours

Define mean pressure and provide its units.

In hectopascals (hPa)

What is mean temperature measured in?

Degrees celcius

Define total sunshine.

sunshine given Nearest 1/10 of an hour

Define maximum gust and provide its units.

In Kn

• Highest instantaneous wind speed

Define humidity

The % of air saturation with water vapor. 100% is the maximum percentage water content air can contain

Define mean cloud cover and provide its units.

• Oktas

• The number of 1/8th of the sky covered

In 2015, What was the temperature range and windspeed range of UK locations.

• Camborne 10-20, 3-18

• Heathrow, 8-29, 3-19

• Hurn, 6-24, 2-19

• Leeming- 4-23, 3-17

• Leuchards, 4-19, 3-23

In 2015, What was the temperature range and windspeed range of international locations?

• Beijing, 8-33, 2-9

• Jacksonville, 15-31, 1-12

• Perth, 8-25, 4-14

What was the UK great storm?

• Night of 15-16th October 1987, gusts upto 100 knots recorded

What were the 2 Florida Hurricances?

• 12th october 1987 Hurricane Floyd

• 1-2nd October 1025 Hurricane Joaquin