Question

Please find the range, sample standard deviation and inter-quartile range (IQR) of the following data set.

31

37

39

42

46

48

55

61

76

76

range =  (Please enter an exact answer.)

standard deviation (ss) =  (Please show your answer to one decimal place.)

IQR =  (Please enter an exact answer.)

A new number, 153, is added to the data set above. Please find the new range, sample standard deviation and IQR of the new data set.

range =  (Please enter an exact answer.)

standard deviation =  (Please show your answer to one decimal place.)

IQR =  (Please enter an exact answer.)

Which measure of spread is less affected by the addition of the extreme observation?

___ IQR

___ Range

___ standard deviation

Answer 1