Interquartile Range

Question

What does the interquartile range describe?
Answer

The lower 50% of the   observations

The middle 50% of the   observations

The upper 50% of the   observations

The lower 25% and the   upper 25% of the observations

Question

Give an example of how systems of equations in 3 variables can be used to solve a problem from health care field.

Question

Fifteen randomly selected college students were asked to state the number of hours they slept the previous night. The resulting data are 5,6,6,8,7,7,9,5,4,8,11,6,7,8,7.   Find the following ;      

a. Variance s2, using formula (2.5)   

b. Variance s2, using formula (2.9)

  c. Standard deviation, s    

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