Write short notes on the following:
Essentials of a good sample
 Coding of data
 Normal Distribution
 Characteristics of a good report

1. Essentials of a good sample:

A good sample is one that accurately represents the population being studied. The essentials of a good sample include:

• Random selection: every member of the population has an equal chance of being selected.
• Adequate size: the sample size should be large enough to accurately represent the population.
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