The following 10 scores were input in the gradebook for Prof. Harris's class. 75, 77, 77, 88, 89, 92, 93, 94, 97, 185
Complete the parts below to identify any outliers.
(a) Let Q, be the lower quartile and Q; be the upper quartile of the data set. Find Q, and Qz for the data set.
9,- 0
93-0
х
5
?
(b) Find the interquartile range (IQR) of the data set.
IQR-
$
?
(C) Calculate a lower boundary using Q, -1.5-IQR. Calculate an upper boundary using +1.5-IQR. (Note that 1.5-IQR means 1.5 times the IQR.)
Lower boundary:
Upper boundary:
х
?
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