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anonymous

  • 5 years ago

Identify the bias in each sample. a) A phone-in radio show asks callers their opinion about the city's baseball team not making the playoffs the day after they are eliminated. b) To learn which team Canadians feel will win the stanley cup, researchers call 100 people from ottawa. c) To find the age that most canadians feel should be the legal driiving age, researches ask 3000 high school students.

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  1. anonymous
    • 5 years ago
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    please help me someone : (

  2. anonymous
    • 5 years ago
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    \[a) voluntary response bias b)inadequate sample size c) \]

  3. anonymous
    • 5 years ago
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    c)..?

  4. anonymous
    • 5 years ago
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    i didnt understand b ..!

  5. anonymous
    • 5 years ago
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    meaning it's biased because it didn't adequately... ok. what I said was wrong. I think it is basically convenience sampling.

  6. anonymous
    • 5 years ago
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    i guess your right

  7. anonymous
    • 5 years ago
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    the third one is i think exactly the same reason.

  8. anonymous
    • 5 years ago
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    so third one is convenience sampling too?

  9. anonymous
    • 5 years ago
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    that's my guess

  10. anonymous
    • 5 years ago
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    next question it says that . Sugeest a way to reduce the bias in each sample in this question

  11. anonymous
    • 5 years ago
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    a) stratified random sampling b) stratified random sampling c) two stage cluster sampling

  12. anonymous
    • 5 years ago
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    can i ask you a question?? what does bias mean .. like i dont get it

  13. bahrom7893
    • 5 years ago
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    bias is like somebody is going to respond that way, ur data will be skewed, for example:

  14. bahrom7893
    • 5 years ago
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    if u go to a rich neighborhood and ask them whether rich ppl should pay more taxes,

  15. bahrom7893
    • 5 years ago
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    they will say NO, and if u go to a poor neighborhood and ask whether rich ppl should pay more taxes ppl are more likely to say yes... So both responses are biased

  16. bahrom7893
    • 5 years ago
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    Basically u give a biased response if u get something sort of like profit from it..

  17. anonymous
    • 5 years ago
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    o okay :) i get it

  18. anonymous
    • 5 years ago
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    basically bias is when the sample mean is different from the true population mean

  19. anonymous
    • 5 years ago
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    so why biased sample may not produce accurate results?

  20. bahrom7893
    • 5 years ago
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    because you won't get accurate results..

  21. anonymous
    • 5 years ago
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    because of methods you use

  22. bahrom7893
    • 5 years ago
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    woops sorry lol, I meant because biased data is just like BSed data

  23. bahrom7893
    • 5 years ago
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    ill let moo explain it lol I've never been good at stat.. Any calculus questions?

  24. anonymous
    • 5 years ago
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    can u help me with statistic questions?

  25. anonymous
    • 5 years ago
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    ?? please"

  26. bahrom7893
    • 5 years ago
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    i can try..

  27. anonymous
    • 5 years ago
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    One way to judge the sucess of a movie is to rank it by ticket sales. however, tickets are more expensive today and theatres hold more people than in the past. suggest a way to remove these biases so that past and present movies can be compared fairly.

  28. bahrom7893
    • 5 years ago
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    well the top option would be make the tickets cheap.

  29. anonymous
    • 5 years ago
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    ok??

  30. bahrom7893
    • 5 years ago
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    Not free, because then rich people would think that this movie is trash which is why they are giving away the tickets.. so you would only get responses from the rich

  31. bahrom7893
    • 5 years ago
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    *sorry meant: Not free, because then rich people would think that this movie is trash which is why they are giving away the tickets.. so you would only get responses from the poor people who would take the tickets

  32. bahrom7893
    • 5 years ago
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    and if the ticket prices were high, then poor people wouldnt be able to afford them and you would get responses from only rich people

  33. bahrom7893
    • 5 years ago
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    and to minimize bias you want responses from both rich and poor people, u need diversity

  34. anonymous
    • 5 years ago
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    oh okk :)

  35. anonymous
    • 5 years ago
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    can i ask next q?

  36. bahrom7893
    • 5 years ago
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    sure..but i am pretty bad at stat if i can't do it then sorry..

  37. anonymous
    • 5 years ago
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    sure :)

  38. bahrom7893
    • 5 years ago
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    its just that my stat teacher was really bad, but i will attempt ur question

  39. anonymous
    • 5 years ago
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    ok

  40. anonymous
    • 5 years ago
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    a popular television sports show asked people to phone in their pick for the NBA Most Valuable player. with 30 min left in the show, they announce the result to that point. a) how might this announcement affect the outcome of the survey? b) Does reporting the early results make the survey biased? explain why or why not?

  41. bahrom7893
    • 5 years ago
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    Okay first of all a) you will definitely get biased results, and you always want to avoid them.

  42. bahrom7893
    • 5 years ago
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    b is easy

  43. bahrom7893
    • 5 years ago
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    b) Reporting survey earlier would decrease the bias because look, it is the end of the game right, and suppose you were going to vote for player A, but turns out player B scored more goals or whatever u call em in basketball (sorry i hate american sports), so you will end up picking player B if you choose when there's 30 mins left..

  44. bahrom7893
    • 5 years ago
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    And if you are reporting it early, then player A and B would have equal chances, because you don't know who is going to perform better..

  45. anonymous
    • 5 years ago
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    ooo

  46. bahrom7893
    • 5 years ago
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    do you kind of get it? If nothing affected your vote then it would NOT be biased, but halfway into the match, you see one guy is better than the other, so something is affecting your vote

  47. anonymous
    • 5 years ago
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    next question is : Melissa asks five of her friends about their favourite type of movie. Four say their fav is comedy. She reports that 80% of teenagers prefer comedies over all other movie types. explain two flaws in her survey.

  48. bahrom7893
    • 5 years ago
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    her sample size is too small..

  49. bahrom7893
    • 5 years ago
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    or not sample size, i mean whatever you call it, you can't get sufficient data from only 5 people

  50. bahrom7893
    • 5 years ago
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    okay it is called a sample size, just looked it up lol

  51. anonymous
    • 5 years ago
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    lol

  52. bahrom7893
    • 5 years ago
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    so now she should NOT have asked her friends who are each others' friends too, because most friends share common tastes, so they all would like comedies, or tragedies or whatever..

  53. bahrom7893
    • 5 years ago
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    i mean friends tend to have same tastes don't they.. all of my friends like math lol ..well sorta..

  54. anonymous
    • 5 years ago
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    yea right :P

  55. bahrom7893
    • 5 years ago
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    any more?

  56. anonymous
    • 5 years ago
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    A local soccer league wants to give its players a bonus: either free soccer balls, free movie tickets , ir coupons for the snack bar. a) Design a survey the league can use to decide which bounus to offer. b) how can the data be collected? c) is it possible to survey the whole population?? explain?

  57. anonymous
    • 5 years ago
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    ??

  58. bahrom7893
    • 5 years ago
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    thinking..

  59. anonymous
    • 5 years ago
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    ok

  60. bahrom7893
    • 5 years ago
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    uhmm i dont get it what is the survey about? do we have to ask whether they want one of those options? either free soccer balls, free movie tickets , ir coupons for the snack bar?

  61. anonymous
    • 5 years ago
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    yessss i gues we need to ask :S

  62. bahrom7893
    • 5 years ago
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    well i guess for part A: We could either mail them letters or something asking what they would prefer, or email them or call them, etc.. B: Let soccer balls be 1 tickets - 2 coupons - 3, ask whichever they prefer and record the number then see how many counts of each number we have..

  63. bahrom7893
    • 5 years ago
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    C: It is never possible to interview the whole population, because some people will think its a scam and not respond, others will just think that its a joke or something and just respond with a random number without actually thinking about what they want..

  64. bahrom7893
    • 5 years ago
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    post the next one..

  65. anonymous
    • 5 years ago
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    explain the difference between response bias and non- response bias. b) are two biases opposites? explain. c) Giv an example of each.

  66. bahrom7893
    • 5 years ago
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    THIS CALLS FOR SOME GOOGLINGG!! LOL afk.. lookin

  67. anonymous
    • 5 years ago
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    hahaha :P man google dosnt make any sense :P coz i need to understand what it is :P lol

  68. bahrom7893
    • 5 years ago
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    Non response bias is NOT the opposite of response bias.. that's as much as i know so far..

  69. bahrom7893
    • 5 years ago
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    okay I know what a response bias is: It occurs when the survey takers says something that he or she thinks the surveyor wants to hear from them.

  70. bahrom7893
    • 5 years ago
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    For example: A teacher asks the kids DID YOU DO YOUR HOMEWORK??? Kids will respond of course we did, because they think they will get punished otherwise..

  71. bahrom7893
    • 5 years ago
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    that's response bias..

  72. anonymous
    • 5 years ago
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    o

  73. anonymous
    • 5 years ago
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    non response is basicaly oppsite of that .. right?

  74. bahrom7893
    • 5 years ago
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    no its not

  75. anonymous
    • 5 years ago
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    outch

  76. bahrom7893
    • 5 years ago
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    so that's half of part a and c so far, let me understand what non response bias is..

  77. bahrom7893
    • 5 years ago
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    Okay non response bias is basically when you don't respond

  78. anonymous
    • 5 years ago
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    thats what i said lol

  79. bahrom7893
    • 5 years ago
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    well u don't DON'T respond just because u think u will be punished or lose something..

  80. anonymous
    • 5 years ago
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    is tht it?

  81. bahrom7893
    • 5 years ago
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    no, imagine this

  82. anonymous
    • 5 years ago
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    did u answer b ??

  83. bahrom7893
    • 5 years ago
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    yeah thats b

  84. bahrom7893
    • 5 years ago
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    they are not opposites..

  85. bahrom7893
    • 5 years ago
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    c) Response bias: teacher : "did u do ur hw?" kids: "yes" even though maybe they didnt Non- response bias:

  86. bahrom7893
    • 5 years ago
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    Imagine a guy standing on the corner of Lexington ave and 23rd street in manhattan asking college kids rushing by whether they want to take a survey.. Most of them including me would say NO, simply because they don't have time..

  87. bahrom7893
    • 5 years ago
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    Lex and 23rd is crazy.... especially durin breaks in b/n classes...=(

  88. bahrom7893
    • 5 years ago
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    so that's C, now for A

  89. anonymous
    • 5 years ago
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    u told me a already dude

  90. bahrom7893
    • 5 years ago
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    oh okay.. =)

  91. bahrom7893
    • 5 years ago
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    sorry im like helpin 3 ppl, hard to keep track... im such a nerd -_-...

  92. bahrom7893
    • 5 years ago
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    i should be enjoying life, but here i am stuck helpin others, i think i should log off...

  93. bahrom7893
    • 5 years ago
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    holy ship 92 replies? *this is 93rd..

  94. anonymous
    • 5 years ago
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    heyy thankyouu soo much.. i was writing the answer :SS :) ur really halpful thanks a lot

  95. bahrom7893
    • 5 years ago
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    ready to help with math only... maybe I should become a math teacher lol, I hate teaching and tutoring, but somehow im okay at it..

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