Statistics: Chapter 1 - Large Data Set - Main Variables

Question 1

Daily Mean Temperature (2 points):

Answer 1

-°C to 1 dp.
-Includes n/a.

Question 2

Daily Total Rainfall (2 points):

Answer 2

-mm to 1 dp.
-tr (0.05mm, count as 0.025).

Question 3

Daily Mean Pressure (3 points):

Answer 3

-hPa to nearest whole number.
-1 hPa = 100 Pascals.
-Higher pressure = better weather.

Question 4

Daily Mean Windspeed (3 points):

Answer 4

-knots to 1 dp.
-1 knot = 1.15 mph.
-Also given on the Beaufort scale (calm, light, moderate, fresh, strong).

Question 5

Daily Total Sunshine (3 points):

Answer 5

-hours to the nearest tenth.
-Includes n/a.
-Sunnier in the summer.

Question 6

Daily Maximum Gust (2 points):

Answer 6

-knots.
-Maximum instantaneous speed, therefore Maximum Gust > Mean Windspeed.

Question 7

Daily Maximum Relative Humidity (3 points):

Answer 7

-%.
-Includes n/a.
-Over 95% is associated with mist and fog.

Question 8

Daily Mean Total Cloud (2 points):

Answer 8

-Oktas (oct = 8).
-0, 1, 2, 3, 4, 5, 6, 7, 8 (9 options).

Question 9

Visibility (2 points):

Answer 9

-Dm to the nearest 100.
-1 Dm = 10 metres.

Question 10

Daily Mean Wind/Gust Direction (3 points):

Answer 10

-bearing (to the nearest 10).
-Direction wind is blowing FROM (e.g. 270° (W) = wind blowing from West to East).
-Cardinal direction (N, NE, NNE, etc.)

Question 11

What two units doesn’t appear overseas?

Answer 11

-n/a.
-tr.

Question 12

What are the 5 UK locations (North to South)?

Answer 12

1. Leuchars.
2. Leeming.
3. Heathrow.
4. Hurn.
5. Camborne.

Question 13

What are the 3 overseas locations (North to South)?

Answer 13

1. Beijing.
2. Jacksonville.
3. Perth.

Question 14

What three variables contain n/a?

Answer 14

-Daily Total Sunshine.
-Daily Mean Windspeed.
-Daily Maximum Gust.

Question 15

The ________ ‘n/a’ variables are all n/a for the first ________ weeks of ________ ________.

Answer 15

Three, two, May 1987.