Design Of Experiments

Question 0

Blinding

Answer 0

A technique where a subject does not know whether they are receiving a treatment or a placebo.

Question 1

Confounding

Answer 1

Occurs when the experimenter is not able to distinguish between te effects of different factors

Question 2

Double-blinding

Answer 2

Neither the subject nor the person giving the treatment know whether it is a placebo or not

Question 3

Blocks

Answer 3

Groups of subjects that are similar in ways that might affect the outcome of the experiment

Question 4

Completely randomized experimental design

Answer 4

Putting subjects into different blocks trough a process of random selection

Question 5

Rigorously controlled design

Answer 5

Subjects are very carefully chosen so that those in each block are similar in ways that are important to the experiment

Question 6

Replication

Answer 6

Repetition of an experiment on sufficiently large groups of subjects

Question 7

Sampling error

Answer 7

The difference between a sample result and the true population result. This type of error is caused by chance sample fluctuations

Question 8

Non sampling errors

Answer 8

This occurs when the sample data are incorrectly collected, recorded, or analyzed.

Question 9

Cross-sectional study

Answer 9

A study in which data are observed, measured and collected at one point each time

Question 10

Retrospective study

Answer 10

A study where data is collected from the past by going back in time

Question 11

Prospective study

Answer 11

Data are collected in the future from grounds sharing common factors