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xxImHisGirlxx

  • one year ago

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  1. xxImHisGirlxx
    • one year ago
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    1. Use the website www.shodor.org/interactivate/activities/histogram/index.html to complete this assignment. Look at the dataset for "Gas Mileage for Year 2000 Cars." Set the bin width to six and describe the distribution

  2. xxImHisGirlxx
    • one year ago
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    I don't understand how to do this, at all. @jim_thompson5910

  3. jim_thompson5910
    • one year ago
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    `bin width` means the width of each histogram bar basically it's another way of saying `interval size`

  4. jim_thompson5910
    • one year ago
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    set "interval size" to 6 and hit the "update interval" button

  5. xxImHisGirlxx
    • one year ago
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    so, it changed it to 6.000, is that right?

  6. jim_thompson5910
    • one year ago
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    yeah I have that too

  7. jim_thompson5910
    • one year ago
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    you should see a lot of thin bars

  8. xxImHisGirlxx
    • one year ago
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    Now what is it asking me to describe?

  9. jim_thompson5910
    • one year ago
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    basically they want the overall shape of the distribution

  10. jim_thompson5910
    • one year ago
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    is it symmetrical? skewed left? skewed right?

  11. xxImHisGirlxx
    • one year ago
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    What is the distribution?

  12. jim_thompson5910
    • one year ago
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    the distribution is the collection of numbers visually it's shown as a histogram

  13. xxImHisGirlxx
    • one year ago
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    and is it skewed left?

  14. jim_thompson5910
    • one year ago
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    well it turns out that the median is 496 and the mean is 507.1734104046 I pasted the numbers (from that text box) into OpenOffice Calc. It's a free spreadsheet program. I used the AVERAGE and MEDIAN functions to find the mean and median. Anyways, because the mean is larger than the median, we have a distribution that is skewed right. Notice we have outliers on the right side. These values pull the mean to the right skewing it.

  15. xxImHisGirlxx
    • one year ago
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    What about this one? 2. Use the website www.shodor.org/interactivate/activities/histogram/index.html to complete this assignment. Many statisticians suggest about seven bins for a histogram. Try this method out on the datasets for "NBA Team Payrolls" and "Horsepower of Cars." What bin width did you choose for each?

  16. jim_thompson5910
    • one year ago
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    hmm I'm not sure. It seems like any whole number would work as long as it's not too small

  17. jim_thompson5910
    • one year ago
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    15 or 20 seems to work

  18. xxImHisGirlxx
    • one year ago
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    Use the website www.shodor.org/interactivate/activities/histogram/index.html to complete this assignment. Many statisticians suggest about seven bins for a histogram. Try this method out on the datasets for "NBA Team Payrolls" and "Horsepower of Cars." Enter in the dataset {1, 3, 4, 5, 6, 7, 9}. Can you choose a bin width for which the data appears skewed right? If so, what is that bin width? Help me with this one?

  19. jim_thompson5910
    • one year ago
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    alter the "interval size" and try to make the distribution skewed right. Basically try to have the majority of the distribution on the left side with outliers on the right side

  20. xxImHisGirlxx
    • one year ago
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    I'm so lost, I really don't understand how to do any of this. :(

  21. xxImHisGirlxx
    • one year ago
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    what does the dataset numbers mean that it gives me?

  22. xxImHisGirlxx
    • one year ago
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    For "NBA team payrolls" would it be 1? I don't know what I'm doing.

  23. jim_thompson5910
    • one year ago
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    they want you to type in 1, 3, 4, 5, 6, 7, 9 but do it in a column of numbers

  24. jim_thompson5910
    • one year ago
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    to be honest, these problems are a bit strange and vague. There is no set rule for what a proper bin size is. This is one reason (of many) why statistics is misleading and can be used to alter the truth in a way

  25. xxImHisGirlxx
    • one year ago
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    So type in the number in the interval box, but separately?

  26. jim_thompson5910
    • one year ago
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    no, in the text box below where you see the big column of numbers

  27. jim_thompson5910
    • one year ago
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    where it says "enter data, 1# per line"

  28. xxImHisGirlxx
    • one year ago
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    So like this? 9 7 6 5 4 3 2 1

  29. xxImHisGirlxx
    • one year ago
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    or, this, 12345679?

  30. jim_thompson5910
    • one year ago
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    yes one big column like you had it the first way

  31. xxImHisGirlxx
    • one year ago
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    then click update data?

  32. jim_thompson5910
    • one year ago
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    correct

  33. xxImHisGirlxx
    • one year ago
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    and then find which one is skewed right?

  34. jim_thompson5910
    • one year ago
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    yes

  35. jim_thompson5910
    • one year ago
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    by adjusting the interval size

  36. xxImHisGirlxx
    • one year ago
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    okay so, I put them numbers in the big column and then play with the interval size until its a skewed right?

  37. jim_thompson5910
    • one year ago
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    correct

  38. xxImHisGirlxx
    • one year ago
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    is the 2.773 look right?

  39. xxImHisGirlxx
    • one year ago
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    on horsepower of cars

  40. jim_thompson5910
    • one year ago
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    4 looks like a good value to make it skewed right a bit

  41. xxImHisGirlxx
    • one year ago
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    what about for the nba team playoffs ?

  42. xxImHisGirlxx
    • one year ago
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    I say 3

  43. jim_thompson5910
    • one year ago
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    3 works

  44. xxImHisGirlxx
    • one year ago
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    Thank you so much!!!

  45. jim_thompson5910
    • one year ago
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    sure thing

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