Large Data Set

Question 1

Sara is investigating the variation of X for Camborne in June and July 1097 with a systematic approach.
She wants to select 20 samples by selecting the first value from random number 1-4 and every third value after that.
Explain why this process may not generate a sample of size 20.

Answer 1

• Large Data set has gaps because some data is not recorded

Question 2

Sara was studying the relationship between rainfall (r mm) and humidity (h%) in the UK. She took 11 random samples from Leuchars from May 1987 in from the large data set.
Suggest how she could make better use of the large data set for her study.

Answer 2

• use data from more UK locations and months
  (Not just more locations, as LDS includes overseas data too)

Question 3

Convert knot to mph.

Answer 3

1 knot = 1.15 mph

Question 4

What is the reading of Daily total sunshine?

Answer 4

In hours, to 1 dp
Eg 4.4 hours

Question 5

What is the reading for Cloud Cover?

Answer 5

Measured in eights
Unit: okras
0 oktas = completely clear sky, 8 oktas = complete overcast