A Level Statistics: Unit 3 - Data Collection Key Words 0.0 / 5 ? StatisticsData Collection.SamplingExperimental DesignA2/A-levelEdexcel Created by: MrsHodgettsStatisticsCreated on: 03-02-22 12:59 793428165 Across 1. This design is a special case of the randomized block design and refers to when the experiment has only two treatment conditions; and participants can be grouped into pairs (7, 5) 4. This is the name given to the treatment which is sometimes used when no treatment is required. It is disguised as a treatment to ensure results are physical and not psychologically expected (7) 5. With this sampling method, everyone or everything has an equal chance of being chosen (6) 7. With this sampling method, the sample is taken at regular intervals from the population (10) 8. This group does not receive a treatment and is used to compare results with (7) 9. This type of trial is when neither the participant nor the person administering the treatment knows if they are in the experimental group or not (6, 5) Down 2. With this sampling method, the population is split into groups or categories and a random sample is taken from one or two of these groups (7) 3. The purpose of this is to eliminate bias (13) 6. With this sampling method, groups or categories are proportionate to that of the population (10) 7. With this sampling method, the initial sample is small but through referrals after each sample is taken, the sample size increases exponentially (8)
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