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

42

45

46

47

55

68

74

74

81

89

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, 248, 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?

• Range
• IQR
• standard deviation