Edexcel AS Maths Statistics and Large
Data Set
At what interval is temperature measured? - ANS-hourly
How many miles consistent with hour is a knot? - ANS-1.15 mph
In the Beaufort scale what does calm (zero) imply? - ANS-< 1kn
In the Beaufort scale what does fresh (5) mean? - ANS-17-21 knots
In the Beaufort scale what does light (1-3) mean? - ANS-1-10 kn
In the Beaufort scale what does moderate (4) mean? - ANS-11-16 kn
Is melted snow/hail recorded in total rainfll? - ANS-yes
What 11 variables are measured in the LDS? - ANS-Daily Mean Temperature, Daily Total
Rainfall, Daily Total Sunshine, Daily Maximum Relative Humidity, Daily Mean Windspeed, Daily
Maximum Gust, Daily Mean Wind Direction, Daily Maximum Gust Direction, Cloud Cover,
Visibility, Pressure
What are the cons of a census? - ANS-time consuming, expensive, cannot be done if it involves
destruction, lots of data to process
What are the cons of opportunity sampling? - ANS-not representative, dependent on researcher
What are the cons of quota sampling? - ANS-can be biased, can be costly or inaccurate to
divide into stratum
What are the cons of sampling? - ANS-less accurate, may be bias
What are the cons of simple random sampling? - ANS-not suitable if sample is large, sampling
frame is needed.
What are the cons of stratified sampling? - ANS-clear strata needed, selection from strata may
not be fair
What are the cons of systematic sampling? - ANS-sampling frame needed, can be bias if
random frame is not used
What are the pros of a census? - ANS-Accurate
What are the pros of opportunity sampling? - ANS-easy, cheap and quick
What are the pros of quota sampling? - ANS-representative of population, no sampling frame,
quick, cheap, allows for easy comparison
What are the pros of sampling? - ANS-cheap, quick, less people needed, less data to process
What are the pros of simple random sampling? - ANS-no bias, cheap, fair
What are the pros of stratified sampling? - ANS-reflective of population structure, guarantees
proportional representation
What are the pros of systematic sampling? - ANS-simple and quick, suitable for large samples
What are the three types of random sampling? - ANS-Simple random, stratified and systematic
What are the types of non random sampling? - ANS-Quota, opportunity
Data Set
At what interval is temperature measured? - ANS-hourly
How many miles consistent with hour is a knot? - ANS-1.15 mph
In the Beaufort scale what does calm (zero) imply? - ANS-< 1kn
In the Beaufort scale what does fresh (5) mean? - ANS-17-21 knots
In the Beaufort scale what does light (1-3) mean? - ANS-1-10 kn
In the Beaufort scale what does moderate (4) mean? - ANS-11-16 kn
Is melted snow/hail recorded in total rainfll? - ANS-yes
What 11 variables are measured in the LDS? - ANS-Daily Mean Temperature, Daily Total
Rainfall, Daily Total Sunshine, Daily Maximum Relative Humidity, Daily Mean Windspeed, Daily
Maximum Gust, Daily Mean Wind Direction, Daily Maximum Gust Direction, Cloud Cover,
Visibility, Pressure
What are the cons of a census? - ANS-time consuming, expensive, cannot be done if it involves
destruction, lots of data to process
What are the cons of opportunity sampling? - ANS-not representative, dependent on researcher
What are the cons of quota sampling? - ANS-can be biased, can be costly or inaccurate to
divide into stratum
What are the cons of sampling? - ANS-less accurate, may be bias
What are the cons of simple random sampling? - ANS-not suitable if sample is large, sampling
frame is needed.
What are the cons of stratified sampling? - ANS-clear strata needed, selection from strata may
not be fair
What are the cons of systematic sampling? - ANS-sampling frame needed, can be bias if
random frame is not used
What are the pros of a census? - ANS-Accurate
What are the pros of opportunity sampling? - ANS-easy, cheap and quick
What are the pros of quota sampling? - ANS-representative of population, no sampling frame,
quick, cheap, allows for easy comparison
What are the pros of sampling? - ANS-cheap, quick, less people needed, less data to process
What are the pros of simple random sampling? - ANS-no bias, cheap, fair
What are the pros of stratified sampling? - ANS-reflective of population structure, guarantees
proportional representation
What are the pros of systematic sampling? - ANS-simple and quick, suitable for large samples
What are the three types of random sampling? - ANS-Simple random, stratified and systematic
What are the types of non random sampling? - ANS-Quota, opportunity
