Data 4.0 / 5 based on 1 rating ? MathematicsStatistics, averages and distributionsASEdexcel Created by: aarafa11Created on: 04-06-18 10:25 What is census data Data collected from the entire population 1 of 32 Whats the advantages of census data completely accurate data 2 of 32 Whats the disadvantages of census data Time consuming. There's a larger volume of data that needs to be processed. The data collection can't be destroyed 3 of 32 What is sampling data Observation taken from the subset of a population 4 of 32 Whats the advantages of sampling data Cheaper. Quicker. Less data to be processed 5 of 32 Whats the disadvantages of sampling data May not be accurate. Data may not be large enough to represent group 6 of 32 What is random simple sampling data Sample has an equal chance of being selected 7 of 32 Whats the advantages of random simple sampling data Bias free. Easy and cheap to do. Sample has an equal chance of being selected 8 of 32 Whats the disadvantages of random simple sampling data Not suitable for large population. Needs a sample frame 9 of 32 What is a sample frame List of all the items in your population 10 of 32 Whats the procedure for simple random sampling Identify the sample frame using numbers for each item. Use a random number generator 11 of 32 What is systematic sampling They are chosen in random intervals in an ordered list 12 of 32 Procedure to systematic sampling Take every k value : pop size/ sample size (Must be random) 13 of 32 Whats the advantage of systematic sampling Simple. Quick. Can use large sample/population 14 of 32 Whats the disadvantage of systematic sampling Sample frame needed. Can be bias if not random 15 of 32 What is stratified sampling Population in strata, Do random sampling 16 of 32 How to work out stratified sampling proportions = sample size/ pop size 17 of 32 What are the advantages of stratified sampling Reflects the population structure. There's proportional representation with groups 18 of 32 What are the disadvantages of stratified sampling Population must be classified into strata. Population size cannot be large . Sample fame needed 19 of 32 What is a strata Population divided into groups 20 of 32 What is a quota sampling Selects the sample which reflects the characteristic of the whole population 21 of 32 Whats the procedure of quota sampling Population divided into groups according to characteristic. Interviewer selects the units 22 of 32 Whats the advantages of quota sampling Small sample to represent the population. No sample frame needed. Quick. Easy comparison between groups 23 of 32 Whats the disadvantages of quota sampling It can introduce bias. Population divided into groups. Inaccurate. No responses isn't recorded 24 of 32 Whats the disadvantages of NON- RANDOM SAMPLING It can introduce bias 25 of 32 What are the random sampling Simple random, systematic, stratified 26 of 32 What are the non random sampling quota, (opportunity/ convenience ) 27 of 32 What is opportunity/ convenience sampling Sample from people available at the time. study is carried out. Must fit the criteria 28 of 32 Whats the advantage opportunity/ convenience sampling easy to carry out. Inexpensive 29 of 32 Whats the disadvantage opportunity/ convenience sampling Unlikely to provide representative samples. Highly dependent on individual research 30 of 32 What would be the sample frame for the 20 computer circuit board having its own serial number The circuit board having its own serial number 31 of 32 What would be the sampling units for the 20 computer circuit board having its own serial number A circuit board 32 of 32
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