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13)What is the difference between the standard deviation and the standard error? Is the standard error a standard deviation?with real world example 19) What makes

13)What is the difference between the standard deviation and the standard error? Is the standard error a standard deviation?with real world example

19) What makes the null hypothesis so important? with real world example

20) What is the single most important number in statistics and why is it so important? with real world example

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