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Math question

posted Nov 03, 2012 19:03:37 by Mlle
Two classes are given two different data management tests on the same material. The scores (out of 50) are shown below.

Stem Leaf
1........7 9 9
2........2 4 5 5 6 8 9
3........0 1 1 2 3 5 6 8
4........1 3

Stem Leaf
1.........9
2.........2 6 9
3.........1 4 5 5 6 8 9
4.........0 2 3 3 4 5 5 6 8


USE OUR PROBLEM SOLVING METHOD, COMPARE THE OVERALL PERFORMANCE OF THE TWO CLASSES (measure of central tendency).
[Last edited Nov 03, 2012 19:05:03]
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8 replies
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Lennie said Nov 04, 2012 16:07:41
I know that there is 20 students in each class.
I need to know the measures of central tendency.

Class 1: Mean-29.2, Median-10.5, Mode-19,25,31

Class 2: Mean-37, Median-38.5, Mode-35,43,45

Class 2 did the best because they had the highest mean, median, and mode therefore they received higher marks on the data management tests.
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31619 said Nov 04, 2012 16:14:03
What I know:
-Two classes were given 2 different data management tests
-They were scored out of 50.

What I need to know:
-The overall performance of the 2 classes

Class 1
Stem Leaf
1........7 9 9
2........2 4 5 5 6 8 9
3........0 1 1 2 3 5 6 8
4........1 3

Class2
Stem Leaf
1.........9
2.........2 6 9
3.........1 4 5 5 6 8 9
4.........0 2 3 3 4 5 5 6 8

Class 1
17+19+19+22+24+25+25+26+28+29+30+31+31+32+33+35+36+38+41+43=620/20= 31

Class 2
19+22+26+29+31+34+35+35+36+38+39+40+42+43+43+44+45+45+46+48= 662/20= 33

Class 1 did not do as well as Class 2 I know this b/c C2 got 33 and C1 got 31 and 33 is two better than 31. So C2 did two better.
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Zahra said Nov 05, 2012 01:23:51
HAHAHAHA Lennie and 31619 got it WRONG! LOLOLOLOLOLOLOLOLOLOL SOO FUNNY! jk jk. Let me show how it's done, watch and learn girls:

What I know:
- Two classes are given two different data mangement tests on the same material.
- Both classes consist of 20 people
- The test scores are out of 50

What I NEED to find out:
- The overall performance of the two classes
- All three measurements of central tendency for both classes (mean, median and mode.)

Da Answer:

Class 1: 17+19+19+22+24+25+25+26+28+29+30+31+31+32+33+35+36+38+41+43 = 584 ÷ 20 = 29.2 (round it) 29

Mean: 29.2
Median: 29.5 because 29 + 30 = 59 ÷ 2 = 29.5 ( 29 and 30 since they are the two middle numbers so add than divide by 2)
Mode: 19, 25 and 31 because they all repeat twice

Class 2: 19+22+26+29+31+34+35+35+36+38+39+40+42+43+43+44+45+45+46+48 = 740 ÷ 20 = 37

Mean: 37
Median: 38.5 because 38 + 39 = 77 ÷ 2 = 38.5 (38 and 39 since they are the two middle numbers so add than divide by 2.)
Mode: 35,43 and 45 because they all repeat twice.

Concluding Sentence! :

Class 2 did better than class 1 on the data magement test because the average was 37 for class 2 which is larger than 29.2 (class 1) by 7.8, also ALL measures of central tendency are larger than Class 1's (the mean, median and mode.)As well if you were to create a histogram the intervals category of 10-19 for class 1 would consist of 3 people who scored a mark in that category and only 2 people in the 40-49 category. Whereas class 2 only had 1 person in the category of 10-19 and 9 in the category of 40-49.

* Two histograms one for class 1 and 1 for class 2, showing all the data perfectly*


THAT'S HOW IT'S DONE
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fletcher4321@hotmail.com said Nov 05, 2012 13:14:08
Lol Mlle I don't get this problem
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31619 said Nov 13, 2012 21:48:03
Hey Zahra i know you didn't mean to but it was kinda mean.
[Last edited Nov 13, 2012 21:48:17]
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FTrinier75 said Mar 05, 2013 19:27:38
PARIS:
-Capital of and biggest city in France
-Its on the seine river in northern french
-2,230,000 population
-Was “Paris” in the 12th century
-very boring flag only red and blue blue repersents Saint Martin and red repersents Saint denis
-The name paris came from a Gaulish Tribe called Parisii
-Produced more then a quater of domestic product
-made 572.4 billion euros in 2010
-A averagely climat with a average of 25.2 in july
-Average of 111.5 days of rain it does not rain alot but it is known for intense sudden showers
-A little history is june 14 1940 5 weeks after the battle of france they fell into control of the german... but central paris went through world war 2 un touched other then troops walking by the arcs of triompe on the 140 anniversaiy
-The city is prety flat the lowest part is 35 m above sea level
-Paris has been the hosts of the 1900 and 1924 olympics the 1938,1998 fifa world cup and the 2007 rubgy world cup
-Has one of the highest GDP after tokyo, new york and los angeles it was 30 of frances GDP
-Paris has 44 hospitals with 90,000 employes its the largest health system
-The density is 24,448 people to Kilometer squared


Effel tower :
-320 m tall
-3
-One of the most reconized structures in the world
-completed in 1889
-The tallest man made structure in the world for 41 years until the chrysler building in newyork
-more then 200,000,000 people have visited from 1889


Louve:
-1 of the world largest musems
-nearly 35,000 objects from pre history to the 19 century
Over 8 million visitors each year ( its the most visited musuem in the world
its home to the mona lisa
during world war 2 it hid all its painting and valubles
theirs a mcdonalds inside
many movies have been filmed in it

Cathedral:
built in 1163 completed in 1345 it took so long because the design was enlarged during constrution
its the scene of the hunchback of notredame
Its a overwhelming size 420 meters long with 2 large towers reaching 69 meters long
The cathedral was restoed for 20 then later restored in 1991-2001
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FTrinier75 said Mar 06, 2013 20:22:29
Arc de Triomphe de l'etoile
It honours thoses who fought and died in the French Revolution nopoleinc wars
-55 m height and 22 m wide
-it was the largest arc of triomphe until in 1982 the arc of triomphe in pyongyang
Its so old in 1919 after the paris victory plane Charles Godefroy flew his Nieuport biplane through it
Located on the right side of the seine
started construction in 1806 august 15 and finished july 29 1836


Other Information about Paris
Catacombs are tombs under the town were their are approx 6 million people
The sports team are football: Paris Saint-Germain FC, basketball: Paris-Levallois Basket,
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FTrinier75 said Mar 07, 2013 20:06:40
-The city's subway was made in 1900 with 300 stations with 214 km of rail
Even though french is the national language english is the most used foreign language thats shouldn't matter for us
There are 4 free newspaper giving out daily
There are largemovie theaters such as the Le Grand Rex
Its been for long time its been the hub of fahsion
Many wines have came out of paris
Sports events that happen are The Paris Marathon, French Open, tour de france,Grand Prix de l'arc de triomohe de l'etoile (Horse races)
80% OF FRANCE is Catholic
Islam is the second biggest religion of france
There are some frnehc rappers like Perfectionnistes feat Holladaze
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