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anonymous

  • one year ago

help please!

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  1. anonymous
    • one year ago
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    @Vocaloid

  2. anonymous
    • one year ago
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  3. Vocaloid
    • one year ago
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    which group do you think has the higher mean??

  4. anonymous
    • one year ago
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    B so D?

  5. Vocaloid
    • one year ago
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    uh, not quite, see how group B has more dots on the left side?

  6. anonymous
    • one year ago
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    yes

  7. Vocaloid
    • one year ago
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    that means that group B is going to have a smaller mean, so our answer is..?

  8. anonymous
    • one year ago
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    C?

  9. Vocaloid
    • one year ago
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    right

  10. anonymous
    • one year ago
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    The following table shows the data collected from a random sample of 100 middle school students on the number of hours they do household chores every week: Weekly Duration of Household Chores Time (in hours) 0–1 2–3 4–5 6–7 Number of Students 32 64 3 1 There are 1,500 students in the school. Based on the sample proportion, how many students in the school would be expected to do household chores for at least two hours every week? 480 960 1,020 1,440

  11. Vocaloid
    • one year ago
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    take a look at the table, how many students do at least 2 hours of chores per week?

  12. anonymous
    • one year ago
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    64

  13. Vocaloid
    • one year ago
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    not quite, think carefully... "at least 2" means anything more than 2

  14. anonymous
    • one year ago
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    right and it says 2-3 hours is 64

  15. Vocaloid
    • one year ago
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    there's more than that, though... look at the table again carefully...

  16. anonymous
    • one year ago
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    4-5 amd 6-7

  17. Vocaloid
    • one year ago
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    right, so we add them all up, giving us...?

  18. anonymous
    • one year ago
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    21

  19. Vocaloid
    • one year ago
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    that's not what I meant, I meant to add the number of students...

  20. anonymous
    • one year ago
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    68

  21. Vocaloid
    • one year ago
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    there we go! now, we have (68 students/100) for our sample, let's multiply this by 1500 students to get our answer (68/100)*(1500) = ?

  22. anonymous
    • one year ago
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    1020

  23. Vocaloid
    • one year ago
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    right

  24. anonymous
    • one year ago
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    The following table shows the data collected from four random samples of 50 students from a small middle school regarding the type of television shows they prefer to watch: Television Show Preferences Sample # News Music Movies Cartoons Total 1 2 12 6 30 50 2 3 10 5 32 50 3 5 13 7 25 50 4 6 19 8 17 50 Based on the results in the table, which type of television show is preferred by the majority of students in the samples? News Music Movies Cartoons

  25. Vocaloid
    • one year ago
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    what do you think the answer is?

  26. anonymous
    • one year ago
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    D?

  27. Vocaloid
    • one year ago
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    right

  28. anonymous
    • one year ago
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    The price of some jewelry sets in a store are shown below: Store Price A $110,000 B $100,000 C $1,110,000 D $130,000 E $120,000 Based on the data, should the mean or the median be used to make an inference about the price of the jewelry sets in the store? Mean, because it is in the center of the data Median, because it is in the center of the data Median, because there is an outlier that affects the mean Mean, because there are no outliers that affect the mean

  29. Vocaloid
    • one year ago
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    hint: is there an outlier?

  30. anonymous
    • one year ago
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    B?

  31. Vocaloid
    • one year ago
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    pay attention to my hint: is there an outlier?

  32. anonymous
    • one year ago
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    no

  33. Vocaloid
    • one year ago
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    are you sure? there is one data point that is much larger than the others

  34. anonymous
    • one year ago
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    oh wait.. there is an outlier

  35. Vocaloid
    • one year ago
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    right, so our answer is...?

  36. anonymous
    • one year ago
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    C?

  37. Vocaloid
    • one year ago
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    good

  38. anonymous
    • one year ago
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    Four students did a survey to find the ice cream flavor sixth-grade students prefer. The table below shows the method each student used to conduct the survey: Student Method Jane Asked 100 sixth-grade students at random what their favorite ice cream flavor is Ken Asked 100 students at random from his seventh-grade class what their favorite ice cream flavor is Sasha Asked 100 eighth-grade students at random what their favorite ice cream flavor is Kevin Asked 100 third-grade students at random what their favorite ice cream flavor is Which student's survey is most likely not biased? Jane Ken Sasha Kevin

  39. Vocaloid
    • one year ago
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    hint: the goal is to find data for 6th graders, so our answer is...?

  40. anonymous
    • one year ago
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    A?

  41. Vocaloid
    • one year ago
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    yup

  42. anonymous
    • one year ago
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    Sue wants to know how many families in her small neighborhood of 50 homes would volunteer to help at a neighborhood animal shelter. She put all the addresses in a bag and drew a random sample of 25 addresses. She then asked those families if they would volunteer to help at the shelter. She found that 18% of the families would volunteer to help at the shelter. She claims that 18% of the neighborhood families would be expected to help at the animal shelter. Is this a valid inference? Yes, this is a valid inference because the 25 families speak for the whole neighborhood Yes, this is a valid inference because she took a random sample of the neighborhood No, this is not a valid inference because she only asked 25 families No, this is not a valid inference because she did not take a random sample of the neighborhood

  43. Vocaloid
    • one year ago
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    this is a random sample, so...?

  44. anonymous
    • one year ago
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    b?

  45. Vocaloid
    • one year ago
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    yes

  46. anonymous
    • one year ago
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  47. Vocaloid
    • one year ago
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    whichever one has the greater MAD has the greater variability

  48. anonymous
    • one year ago
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    A?

  49. Vocaloid
    • one year ago
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    read the problem carefully...

  50. anonymous
    • one year ago
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    b?

  51. Vocaloid
    • one year ago
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    good

  52. Vocaloid
    • one year ago
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    I really need sleep, how many more are there?

  53. anonymous
    • one year ago
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    5 quick ones :) and thats it .. i promise

  54. Vocaloid
    • one year ago
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    sure

  55. anonymous
    • one year ago
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    The following table shows the data collected from 2 random samples of 100 students each from an after-school club regarding their favorite outdoor activity: Sample Canoeing Bike Racing Reading Total 1 40 35 25 100 2 45 40 15 100 Which of the following observations can be made about the number of students in the club who prefer canoeing? It is more than the number of students who prefer bike racing and reading combined. It is less than the number of students who prefer bike racing and reading combined. It is equal to the number of students who prefer reading. It is less than the number of students who prefer bike racing.

  56. Vocaloid
    • one year ago
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    what do you think the answer is? just go through each choice and see which one is true

  57. anonymous
    • one year ago
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    d?

  58. Vocaloid
    • one year ago
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    are you sure? is the number for canoing less than the number for bike racing?

  59. anonymous
    • one year ago
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    no

  60. Vocaloid
    • one year ago
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    so d is not the answer, keep trying

  61. anonymous
    • one year ago
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    b

  62. Vocaloid
    • one year ago
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    right

  63. anonymous
    • one year ago
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    Noah wants to predict who will be selected as the sixth-grade treasurer for student council. Which of the following groups should Noah survey to make his prediction? The first 100 students from an alphabetical list of the entire school The first 100 students from an alphabetical list of sixth graders One hundred random students from the entire school One hundred random students from the sixth grade

  64. Vocaloid
    • one year ago
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    well, like always, we want a random sample, and we want 6th graders, so our answer is...?

  65. anonymous
    • one year ago
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    D?

  66. Vocaloid
    • one year ago
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    yes

  67. anonymous
    • one year ago
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  68. Vocaloid
    • one year ago
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    what do you think? which one has the higher mean?

  69. anonymous
    • one year ago
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    b?

  70. Vocaloid
    • one year ago
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    no, look at the graphs carefully... which one has more dots on the right side?

  71. anonymous
    • one year ago
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    grade 6 so A?

  72. Vocaloid
    • one year ago
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    yes

  73. anonymous
    • one year ago
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  74. Vocaloid
    • one year ago
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    like we've said before... higher mean absolute deviation means higher variability...

  75. anonymous
    • one year ago
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    b or d right?

  76. Vocaloid
    • one year ago
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    choose one...

  77. anonymous
    • one year ago
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    d

  78. Vocaloid
    • one year ago
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    right

  79. anonymous
    • one year ago
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    last one!

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  80. Vocaloid
    • one year ago
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    well, which one has the greater mean?

  81. anonymous
    • one year ago
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    A?

  82. Vocaloid
    • one year ago
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    yes, so our answer is A

  83. anonymous
    • one year ago
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    ok thank you for everything :)

  84. Vocaloid
    • one year ago
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    no problem, don't forget to medal. good night ~

  85. anonymous
    • one year ago
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    goodnight! oh! can you answer these quick questions please ... really fast.. they are not problems they are just questions ..please :)

  86. anonymous
    • one year ago
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    What are scale drawing? Give an example.

  87. anonymous
    • one year ago
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    @Vocaloid

  88. anonymous
    • one year ago
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    @Vocaloid ??

  89. anonymous
    • one year ago
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    are you there?

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