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kitty159

  • 2 years ago

The scatter diagram of SAT verbal and math scores in a state is roughly football shaped, and the correlation is 0.65. A student is on the 90th percentile of verbal scores. Find the regression estimate of this student’s percentile rank in math.

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  1. amistre64
    • 2 years ago
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    http://omega.albany.edu:8008/mat108dir/exam2-prep/prank-m2h.html i think this might be helpful fo rthis

  2. amistre64
    • 2 years ago
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    i cant seem to work out the steps :/ but does any of it sound familiar? or were you thinking a different method?

  3. kitty159
    • 2 years ago
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    got the 90th percentile for thA student is on the 40th percentile of verbal scores. Find the regression estimate of this student’s percentile rank in math.is question it is 79.75 but I am stuck with the 40th percentile i.e mt answer for this is

  4. amistre64
    • 2 years ago
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    z score for .9000 is what, 1.28 1.28 * .65 = .832 a zscore of 0.83 gives a percent near 79.7%

  5. amistre64
    • 2 years ago
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    not sure i understand that last post

  6. kitty159
    • 2 years ago
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    I got 79.75 as the answer for 90th percentile. I have the problem working out percentiles and need the formula to work out this I am now looking at the 40th percentile for the same question.

  7. amistre64
    • 2 years ago
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    im not sure the formula, i have to use a table

  8. kitty159
    • 2 years ago
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    High were can I find this table I have sat working it out would be helpful if you can let me know where I can get a copy of the table

  9. amistre64
    • 2 years ago
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    a have a ztable that starts at z=0; percentile = 50 since the z is mirrored along a normal curve, percentile of 40 is the negavite of 60 z60 = 0.25 ; z40 = -0.25

  10. amistre64
    • 2 years ago
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    http://4.bp.blogspot.com/_5u1UHojRiJk/TEh9BHxxPUI/AAAAAAAAAIQ/DafeQNMYFoE/s1600/ztable.gif ztable -.25*.65 = -.1625, or a zscore of about -.16

  11. amistre64
    • 2 years ago
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    -.16 is equal to .16, -50 so about 6.4%

  12. amistre64
    • 2 years ago
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    im not sure im doing it correctly tho :/

  13. kitty159
    • 2 years ago
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    ok got it found a table was guessing these

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