(Answered) What is the purpose of sampling

Statistics

1. Can mean, median, or mode be calculated from all statistical data? Explain why or why not. When is the mean the best measure of central tendency? When is the median the best measure of central tendency?

2. What is the purpose of sampling? What are some concerns and dangers of sampling? How important is the sample design to data validity?

3. Explain how mean is calculated. Explain how a median is calculated with an even number list. Define an array. Provide an example. Define a mode. Identify if you can have more than one modal number in a set of data.

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