Please find the range, sample standard deviation and inter-quartile range (IQR) of the following data set. 21 21 31 36 48 72 74 75 88 93 range = (Please enter an exact answer. ) standard deviation (8) = (Please show your answer to one decimal place.) IQR = (Please enter an exact answer.) A new number, 224, 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? O IQR O Range O standard deviation