What is the interquartile range of this data set?
2, 5, 9, 11, 18, 30, 42, 55, 58, 73, 81

Explanation:

Interquartile range is the difference between the third and the first quartile of a data set.

It is designated by IQR = Q₃ - Q₁.

Then, you must determine first quartile, Q₁, and third quartile, Q₃.

To determine the quartiles you must order the numbers in the data set. They already are ordered.

Then, separate them in two equal parts. When the amount of data in the set is odd, the middle number is the median and it separates the data set into two equal parts:

[ 2, 5, 9, 11, 18 ] 30 [ 42, 55, 58, 73, 81 ]

                          ↑

                       median

The first quartile, Q₁, is the median of the first half of data. This is the median of [ 2, 5, 9, 11, 18 ]. The median is the value of the middle so it is 9.

The third quartile, Q₃, is the median of the second half of data. This is the median of [ 42, 55, 58, 73, 81 ]. The median, again, is the middle, so it is 58.

And, IQR = Q₃ - Q₁ = 58 - 9 = 49.

this story was prepared by jim

mccullaugh in los angeles and

al stewart in new york.

new york the colossal success of "top gun" appears to have dramatically altered madison avenue's

perception of corporate sponsorship

of home video projects.

the paramount home video re- lease, featuring a 60- second diet

pepsi spot, was by no means the

first prerecorded video to carry an advertiser's plug, but it was the

first major theatrical release to do so. in the aftermath of the title's

success, paramount is widely ex- pected to ink a similar deal for

"crocodile dundee" or "star trek

iv" or both.

corporate america's new attraccds push british

recording sales

to 19% gain

london fueled by the compact

disk boom, the value of u.k. manu- facturer shipments of recordings

rose 19% in the 12 -month period ended march 1987, according to the

british phonographic industry.

total value of u.k. shipments for

the period was $755 million for all

configurations. (all value figures

are based on an exchange rate of

$1.68 to the pound sterling.)

cd sales totaled 10.7 million units

worth $121.3 million- compared

with 3.7 million units worth $39.5

million in the prior 12 months -and

accounted for two -thirds of the

overall gain in trade value. at present growth rates, says the bpi, cd

sales for calendar 1987 will reach 20

(continued on page 79)

step-by-step explanation:

the answer is 96 degrees

step-by-step explanation:

you have to realize that a line equals 180 degrees