Answer
a. Mean = (35,38,40,40,54,67,81,94,125,130,555) / 11 = 114.45
b. Median = middle value = 67
$Q_{1}$ = 25% of the data which is 3rd value = 40,
$Q_{3}$ = 75% of the data which is 9th value = 125
c. Range = largest value – smallest value
= 555 – 35 = 520
IQR = $Q_{3} - Q_{1}$ = 125 – 40 = 85
Work Step by Step
a. Mean = (35,38,40,40,54,67,81,94,125,130,555) / 11 = 114.45
b. Median = middle value = 67
$Q_{1}$ = 25% of the data which is 3rd value = 40,
$Q_{3}$ = 75% of the data which is 9th value = 125
c. Range = largest value – smallest value
= 555 – 35 = 520
IQR = $Q_{3} - Q_{1}$ = 125 – 40 = 85
