Mrs. sparks is a 9th grade Algebra 1 teacher. She teaches three algebra 1 courses and all the classes recently took a chapter exam. below are the scores. class 1 45 68 77 90 90 95 100 100 86 90 50 55
class 2 64 65 70 40 100 87 84 88 90 90 95 80
class 3 70 75 75 90 100 80 55 65 76 80 88 99

a. find the mean, median, mode and range of class 1.
b. find the mean, median, mode and range of class 2.
c. find the mean, median, mode and range of class 3.
d. find the standard deviation of class 1.
e. find the standard deviation of class 2.
f. find the standard deviation of class 3.
g. which class had a higher standard deviation and what does that mean?
h. in your opinion, which class did better on the exam? explain your answer.

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

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step-by-step explanation:

step-by-step explanation:

in which figure is point g a centroid