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skittles223

  • 2 years ago

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

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  1. Rosh007
    • 2 years ago
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    do you know what is mean output?

  2. skittles223
    • 2 years ago
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    no srry

  3. Rosh007
    • 2 years ago
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    Ok... a mean output is the average output.. Do you know how to find the averages?

  4. skittles223
    • 2 years ago
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    no i forget

  5. Rosh007
    • 2 years ago
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    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?

  6. skittles223
    • 2 years ago
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    45.5

  7. Rosh007
    • 2 years ago
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    ..... can you just tell me what steps you have done?

  8. skittles223
    • 2 years ago
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    i added them all up and divided by how many numbers was there which was 4

  9. Rosh007
    • 2 years ago
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    Your method is correct.. but answer need correction here only we have two papers..then how the total number is 4?

  10. skittles223
    • 2 years ago
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    or 91 is the answer

  11. skittles223
    • 2 years ago
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    or is it 41

  12. Rosh007
    • 2 years ago
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    can you say how you got 91 and 41 ?

  13. skittles223
    • 2 years ago
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    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

  14. Rosh007
    • 2 years ago
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    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)

  15. skittles223
    • 2 years ago
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    the second one

  16. skittles223
    • 2 years ago
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    but can we go ahead and get to my question so i can get this done plz

  17. Rosh007
    • 2 years ago
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    sure.. now how many bags are there?

  18. skittles223
    • 2 years ago
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    8 bags

  19. Rosh007
    • 2 years ago
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    so that is what your total numbr is.. now what you need to do to find the mean output?

  20. skittles223
    • 2 years ago
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    how do you do that

  21. Rosh007
    • 2 years ago
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    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?:)

  22. Rosh007
    • 2 years ago
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    ok... what is the machine 1's average output

  23. skittles223
    • 2 years ago
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    310.7

  24. Rosh007
    • 2 years ago
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    how you got it?

  25. skittles223
    • 2 years ago
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    i added up all the numbers in machine 1 and then i got 2487 then i divided it by 8 and got 310.7

  26. Rosh007
    • 2 years ago
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    exactly... but i think you missd to add 0.5s... please add and verify your answer

  27. Rosh007
    • 2 years ago
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    got it?

  28. skittles223
    • 2 years ago
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    is it 350.2

  29. Rosh007
    • 2 years ago
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    309+ 311.5+313+310+308+314+312+310.5 =?

  30. skittles223
    • 2 years ago
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    it equals to 2488

  31. skittles223
    • 2 years ago
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    when you just add them

  32. Rosh007
    • 2 years ago
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    yes.. now find average

  33. skittles223
    • 2 years ago
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    311

  34. Rosh007
    • 2 years ago
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    yup... you got the average output of machine one.... congrads now find the averag output of machine 2

  35. skittles223
    • 2 years ago
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    2490 before u divide for machine 2 right

  36. Rosh007
    • 2 years ago
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    yes

  37. Rosh007
    • 2 years ago
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    so average or mean output of machine 2 is ?

  38. skittles223
    • 2 years ago
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    311.2

  39. Rosh007
    • 2 years ago
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    yes.. can you give 2 decimal digit answer

  40. Rosh007
    • 2 years ago
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    means after decimal point two more numbers (which incrases the precision of your answer)

  41. skittles223
    • 2 years ago
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    311.25

  42. Rosh007
    • 2 years ago
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    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?

  43. Rosh007
    • 2 years ago
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    ***mean output of machine 3

  44. Rosh007
    • 2 years ago
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    give two or three digits after decimal point

  45. Rosh007
    • 2 years ago
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    Got it???

  46. skittles223
    • 2 years ago
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    the third machine has a sum of 2491 before dividing

  47. skittles223
    • 2 years ago
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    the mean out put of machine three is 311.375

  48. Rosh007
    • 2 years ago
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    Yes.... yess... you got the mean output of alll your machines... now rad the question and tell me what is the correct answer?

  49. skittles223
    • 2 years ago
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    machine three has the highest because machine 1 only has 311 machine two only has 311.25 and machine three has 311.375

  50. Rosh007
    • 2 years ago
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    yup.... congratulations again......... averages or mean is ok for you now :)

  51. Rosh007
    • 2 years ago
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    also... there are som simple tricks to find mean values... you may study later

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