What Surveys Tell Us

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The pH of a river water sample as measured by pH paper is found to be 6. What does it tell us about water ?

What is the total population of India as per the latest survey? Also tell rural and urban population of India as per this survey.

How significant figure tells us the accuracy ?

A survey was conducted. 1200 people answered the survey. 24% people who were mailed the survey questionnaire answered the survey. The survey questionnaire was mailed to how many people?

Explain what the reasons for the following are. What do these tell you about Einstein?