Large Data Set

Question 1

At what time period is using the regression equation to estimate a response variable unreliable?

Answer 1

✯ Using the regression equation for bivariate data in the large data set to estimate a response variable for the months outside of May-October is unreliable (Extrapolated value)

Question 2

What weather stations are in the Northern hemisphere?

Answer 2

✯ UK
✯ Jacksonville
✯ Beijing

Question 3

What weather stations are in the Southern hemisphere?

Answer 3

✯ Perth

Question 4

When is summer in the Northern hemisphere?

Answer 4

✯ July - September

Question 5

What time period is winter in the Southern hemisphere?

Answer 5

✯ July - September

Question 6

In what months is it windier, wetter, darker and colder?

Answer 6

✯ December, January, February

Question 7

In August, July and June, what are the conditions?

Answer 7

✯ Calmer, Drier, Brighter and Hotter

Question 8

Tell me the names of weather stations in the UK in alphabetical order from South to North.

Answer 8

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

Question 9

What are the coastal areas in the UK, and what special condition is in these coastal areas?

Answer 9

1. Camborne and Leuchars
2. Coastal - windier.

Question 10

What are the range of values of daily mean temperature?

Answer 10

✯ 5-24°C

Question 11

What are the range of values of daily total rainfall?

Answer 11

✯ 0-20mm (measured to 1 d.p)

Question 12

What is a detail about daily total rainfall as a whole?

Answer 12

✯ It is not symmetrical, many tr and 0 values.

Question 13

What is daily total sunshine measured in?

Answer 13

✯ Hours to 1dp.

Question 14

What is the range of daily total sunshine?

Answer 14

✯ 0-14 hours.

Question 15

What is daily maximum relative humidity?

Answer 15

✯ Amount of water vapour in the air.

Question 16

What is cloud cover measured in?

Answer 16

✯ Oktas

Question 17

What is the range of cloud cover?

Answer 17

✯ 0 to 8.

Question 18

What is cloud cover, and what is a detail about it?

Answer 18

✯ Integers, measuring what fraction of the sky is covered in clouds.

Question 19

What is humidity measured in?

Answer 19

✯ %

Question 20

What is the range of humidity?

Answer 20

✯ 70% - 100%

Question 21

What is daily mean visibility measured in?

Answer 21

✯ Decametres (rounded to nearest hundred)

Question 22

What is the measurement conversion of decametres and metres?

Answer 22

✯ 1 Dm = 10m

Question 23

What is daily mean pressure measured in?

Answer 23

✯ Hectopascals (hPa)

Question 24

What are the range of values of daily mean visibility?

Answer 24

✯ 200Dm - 4000 Dm

Question 25

What are the ranges of daily mean pressure

Answer 25

✯ 990 hPa - 1040 hPa

Question 26

What does 'tr' mean?

Answer 26

✯ There was a trace of water in the measuring instrument <0.05mm.

Question 27

What does cleaning data mean?

Answer 27

✯ We replace tr when calculating data with 0.025 mm or 0mm.

Question 28

What is daily mean windspeed measured in?

Answer 28

✯ Knots (kn)

Question 29

What are the ranges of daily mean windspeed?

Answer 29

✯ 3kn to 10kn

Question 30

What are the units of windspeed, Beaufort conversion?

Answer 30

✯ Qualitative.

Question 31

The range of windspeed, Beaufort conversion?

Answer 31

✯ Light to moderate. Most days are light.

Question 32

What is wind/gust direction measured in?

Answer 32

✯ Degrees as it is a bearing.

Question 33

Range of wind/gust direction is?

Answer 33

✯ 10° to 360 °

Question 34

What is daily maximum gust measured in?

Answer 34

✯ Kn (Knots)

Question 35

What is the typical range of daily maximum gust?

Answer 35

✯ 8kn to 50kn

Question 36

What unit is the wind/gust direction (Cardinal)

Answer 36

✯ Compass direction

Question 37

What do we know about Australia's seasons?

Answer 37

✯ Flipped seasons due to being in the Southern hemisphere.

Question 38

What is a key characteristic of China's seasons?

Answer 38

✯ Hotter, wetter summers ✯ Colder winters

Question 39

In Jacksonville (Florida), what are some key characteristics?

Answer 39

✯ Hot summers ✯ There are hurricanes in October.

Question 40

Common sense box #1 If the temperature increases...

Answer 40

✯ The amount of sunshine will increase. ✯ The amount of rainfall will decrease ✯ The windspeed will decrease.

Question 41

Common sense box #2 As we move further north, during May to October...

Answer 41

✯ The temperature decreases ✯ The amount of rainfall increases. ✯ The maximum hours of sunshine increases.

Question 42

Which weather stations produce the hottest weathers?

Answer 42

✯ Jacksonville and Beijing ✯ with Beijing having the hottest days recorded.

Question 43

Can you compare which of the hottest weather stations is hotter?

Answer 43

✯ Jacksonville is still hotter than Beijing on average.

Question 44

What is the coldest month?

Answer 44

✯ October

Question 45

When does it rain the most in the UK?

Answer 45

✯ August

Question 46

What does Daily Maximum Gust Direction (cardinal direction) actually mean?

Answer 46

✯ The direction the wind is blowing from. e.g. direction of 270 degrees (West) means the wind is blowing from West to East.

Question 47

Overseas, what units do not appear?

Answer 47

✯ Tr and n/a

Question 48

There are only four values to have n/a, and are all n/a in which time period?

Answer 48

✯ Daily total sunshine ✯ Daily total sunshine ✯ Daily mean windspeed (Beaufort conversion) ✯ Daily maximum gust

Question 49

Which variables are discrete?

Answer 49

- Cloud cover (0-8, 9 outcomes) - Cardinal Directions (16 outcomes)

Question 50

When is it warmer, and more hours of sunshine in the day?

Answer 50

✯ Weather stations in the South

Question 51

How many months is the large data set, and from which years?

Answer 51

✯ 6 months from 1987 - 2015.

Question 52

Knots to mph?

Answer 52

1kn = 1.15mph

Question 53

Cloud cover can vary from place to place and month to month, what is an appropriate refinement for the model of cloud cover?

Answer 53

✯ I know cloud cover uses discrete uniform distribution, but we could perhaps use non uniform distribution as the probability varies.

Question 54

What are suitable stratas or categories to use for quota sampling?

Answer 54

✯ time slots, departments, gender, age groups, distance travelled