Results 1 to 1 of 1

Math Help - Stats help - multiple choice part 2

  1. #1
    Newbie
    Joined
    May 2009
    Posts
    6

    Stats help - multiple choice part 2

    5. A community college announces that the correlation between college entrance exam grades and scholastic achievement was found to be –1.08. On the basis of this you would tell the college that
    (a) the entrance exam is a good predictor of success.
    (b) the exam is a poor predictor of success.
    (c) students who do best on this exam will be poor students.
    (d) students at this school are underachieving.
    (e) the college should hire a new statistician.

    6. A researcher finds that the correlation between the personality traits “greed” and “superciliousness” when both are measured on a numerical scale is –0.40. What percent of the variation in greed can be explained by the relationship with superciliousness?
    (a) 0% (b) 16% (c) 20% (d) 40% (e) 60%

    7. Scientists rated the activity level of fish at different temperatures (Celsius). A rating of 0 indicates no activity and a rating of 100 indicates extremely heavy activity. The data they collected are given in the table below.
    Fish act. 82 65 62 90 51 79 87
    Water temp. 21 24 29 18 29 22 20
    Which of the following statements is true?
    (a) The level of fish activity helps explain the water temperature. At low levels of fish activity, the water is cooler. As fish move around more, water temperature increases.
    (b) Increasing the water temperature causes the fish to swim faster.
    (c) As water temperature decreases, the level of fish activity increases somewhat constantly.
    (d) The correlation coefficient, 0.91, indicates that there is a fairly strong positive linear relationship between level of fish activity and temperature.
    (e) Based on our sample data, we can safely estimate that the level of fish activity would be about 34 at a temperature of 12
    Last edited by mr fantastic; May 3rd 2009 at 09:14 PM. Reason: Moved from original thread
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Multiple Choice Help
    Posted in the Trigonometry Forum
    Replies: 5
    Last Post: September 13th 2009, 09:57 PM
  2. Stats help - multiple choice part 1
    Posted in the Advanced Statistics Forum
    Replies: 0
    Last Post: May 3rd 2009, 02:34 PM
  3. Multiple Choice
    Posted in the Differential Geometry Forum
    Replies: 2
    Last Post: April 27th 2009, 04:38 AM
  4. Multiple Choice!
    Posted in the Algebra Forum
    Replies: 1
    Last Post: February 4th 2009, 01:46 PM
  5. Multiple choice problems - stats
    Posted in the Advanced Statistics Forum
    Replies: 5
    Last Post: January 11th 2009, 09:13 PM

Search Tags


/mathhelpforum @mathhelpforum