HELP ASAP ( COLLEGE STATISTICS)

posted by .

Describe in words the nature of the relationship between each pair of variables as indicated by the value of the correlation coefficient. Be sure to include

a. the direction of the relationship.
b. the strength of the relationship.
c. a verbal description of the way the variables "go together."
d. an appropriate graph of the relationship. (for the graphing portion, describe what the scatterplot should look like in terms of slope, linear characteristics, etc)

1. r = -.96 between craving for pizza and ability to concentrate on studying.
2. r = +.02 between length of marriage and marital satisfaction.
3. r = +.55 between parent and child intelligence test scores.
4. r = -.90 between amount of alcohol consumed and performance on a motor coordination task.
5. r = +.75 between amount of money won and the number of hot dogs purchased at race tracks.
6. r = +.67 between scores on a hyperactivity scale and an aggressiveness scale.
7. r = -.82 between a job applicant's age and likelihood of being hired.
8. r = +.06 between the number of yearly predictions by psychics and the number of correct predictions.

I NEED HELP AM NOT UNDERSTANDING THIS.

  • HELP ASAP ( COLLEGE STATISTICS) -

    Positive r, both variables increase/decrease together. The direction is from lower left to upper right.

    Negative r, one variable increases while the other decreases. Direction is from upper left to lower right.

    r = ± 1 = prefect predictability, straight line. r = 0 = no predictability, scores spread randomly. As approach 1, the spread gets less and less, and predictability gets greater.

    The above information should help you answer the above questions.

  • HELP ASAP ( COLLEGE STATISTICS) -

    1

  • HELP ASAP ( COLLEGE STATISTICS) -

    dhjbdh

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. psychology

    In psychology,correlation measure the strength of the link between two variables. It is also important to know that correlations do not show: a)the strength of the relationship b)causation c)the direction of the relationship d)what …
  2. STATISTICS

    A) If a regression experiment has correlation coefficient r= 0.75, what precent of total variation is explained by the regression?
  3. Statistics

    The linear correlation coefficient, r, is a numerical measure of the strength of the relationship between two variables representing quantitative data.
  4. Statistics

    True or false? The linear correlation coefficient, r, is a numerical measure of the strength of the relationship between two variables representing quantitative data.
  5. statistics

    In a study of the relationship between self-concept and achievement, a correlation of 0.75 was found. this indicates that the relationship between these two variables is: a) weak and positive b) strong and postitive c) weak and negative …
  6. social psy

    ) Researcher wants to look at the correlation between class attendance and grade in class (higher numbers indicating a higher grade). The researcher found the following result r = .82. The correlation coefficient tells researchers …
  7. statistics

    A student computes the correlation between two variables in a spreedsheet and finds r= 0.06.Is there a relationship between the variables?
  8. Statistics

    5. For the data presented below, answer the questions that follow. Score on political Score on current Individual awareness test events test 1 24 23 2 16 12 3 11 11 4 9 6 5 8 13 6 14 11 7 17 16 8 19 16 9 21 21 10 25 25 11 18 11 12 …
  9. statistics

    Construct a scatterplot. b. Draw a regression line through the data point that “fits” the data points reasonably well. c. Enclose the data points with a ellipse. d. Estimate the direction of the correlation. e. Estimate the strength …
  10. Math (Stats)

    In order to predict y-values using the equation of a regression line, what must be true about the correlation coefficient of the variables?

More Similar Questions