Question

Find median of the following data:
class: 0-10 10-20 20-30 30-40 40-50
frequency: 5 15 20 12 8

Answer 1

Answer:

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Answer 2

Explanation:

Which of the following is a preferred method of statistical studies, and why ? (a) Census (b) Sample. Answer : Sample method of statistical investigation is generally preferred to the census method because the former is less expansive in terms of the time, money and effots involved.