anonymous
  • anonymous
A cereal factory has three machines for dispensing cereal into bags. A test is done in which 8 bags are filled by each machine and the bags are weighed.The results in grams:Machine 1: 309, 311.5, 313, 310, 308, 314, 312, 310.5 Machine 2: 310, 309, 314, 311, 309, 314.5, 312.5, 310 Machine 3: 309, 310.5, 313.5, 315.5, 310, 311, 312, 309.5 Which statement is true about the mean output of the three machines?Answer: a. Machine 1 has the highest b. Machine 2 has the highest c. Machine 3 has the highest d. All three machines have the same mean e. Two machines share the highest
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
do you know what is mean output?
anonymous
  • anonymous
no srry
anonymous
  • anonymous
Ok... a mean output is the average output.. Do you know how to find the averages?

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anonymous
  • anonymous
no i forget
anonymous
  • anonymous
ok... averege is the = total sum divided by total number consider in your exam you have 2 papers... in one paper you got 40 out of 50 and in othr paper you got 42 out of 50... then using the concept of avrages can you just tell me what is your average mark?
anonymous
  • anonymous
45.5
anonymous
  • anonymous
..... can you just tell me what steps you have done?
anonymous
  • anonymous
i added them all up and divided by how many numbers was there which was 4
anonymous
  • anonymous
Your method is correct.. but answer need correction here only we have two papers..then how the total number is 4?
anonymous
  • anonymous
or 91 is the answer
anonymous
  • anonymous
or is it 41
anonymous
  • anonymous
can you say how you got 91 and 41 ?
anonymous
  • anonymous
cause the 91 i got by adding the 40 and the 50 and the 42 and the 50 and then dividing it by 2 and i got 91 then i just added the 40 and 42 and divided it by 2
anonymous
  • anonymous
what you think which is more accurate.... first case you added 4 numbers (which makes total number is 4) second case you added 2 numbers (which makes total number 2)
anonymous
  • anonymous
the second one
anonymous
  • anonymous
but can we go ahead and get to my question so i can get this done plz
anonymous
  • anonymous
sure.. now how many bags are there?
anonymous
  • anonymous
8 bags
anonymous
  • anonymous
so that is what your total numbr is.. now what you need to do to find the mean output?
anonymous
  • anonymous
how do you do that
anonymous
  • anonymous
remember mean output is the average output..... you need to find the avrage output of each machine.... you have the total number of bags that each machine process and you know each bages weight..now you need to find the average of each machines output separatly and compare the results to obtain answer..any clue... think twice?:)
anonymous
  • anonymous
ok... what is the machine 1's average output
anonymous
  • anonymous
310.7
anonymous
  • anonymous
how you got it?
anonymous
  • anonymous
i added up all the numbers in machine 1 and then i got 2487 then i divided it by 8 and got 310.7
anonymous
  • anonymous
exactly... but i think you missd to add 0.5s... please add and verify your answer
anonymous
  • anonymous
got it?
anonymous
  • anonymous
is it 350.2
anonymous
  • anonymous
309+ 311.5+313+310+308+314+312+310.5 =?
anonymous
  • anonymous
it equals to 2488
anonymous
  • anonymous
when you just add them
anonymous
  • anonymous
yes.. now find average
anonymous
  • anonymous
311
anonymous
  • anonymous
yup... you got the average output of machine one.... congrads now find the averag output of machine 2
anonymous
  • anonymous
2490 before u divide for machine 2 right
anonymous
  • anonymous
yes
anonymous
  • anonymous
so average or mean output of machine 2 is ?
anonymous
  • anonymous
311.2
anonymous
  • anonymous
yes.. can you give 2 decimal digit answer
anonymous
  • anonymous
means after decimal point two more numbers (which incrases the precision of your answer)
anonymous
  • anonymous
311.25
anonymous
  • anonymous
Exactly.... well done...... ... in this case this answer (311.2) is sufficient but it won't b in another case where we require more precision.. ok.... Can you give me the mean out out of machine 3 then?
anonymous
  • anonymous
***mean output of machine 3
anonymous
  • anonymous
give two or three digits after decimal point
anonymous
  • anonymous
Got it???
anonymous
  • anonymous
the third machine has a sum of 2491 before dividing
anonymous
  • anonymous
the mean out put of machine three is 311.375
anonymous
  • anonymous
Yes.... yess... you got the mean output of alll your machines... now rad the question and tell me what is the correct answer?
anonymous
  • anonymous
machine three has the highest because machine 1 only has 311 machine two only has 311.25 and machine three has 311.375
anonymous
  • anonymous
yup.... congratulations again......... averages or mean is ok for you now :)
anonymous
  • anonymous
also... there are som simple tricks to find mean values... you may study later

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