Purchase Solution

Bivariate data sets

Not what you're looking for?

Ask Custom Question

Below are four bivariate data sets and the scatter plot for each. (Note that each scatter plot is displayed on the same scale.) Each data set is made up of sample values drawn from a population.

Figure 1
x y
1.0 7.7
2.0 8.7
3.0 6.9
4.0 5.7
5.0 8.5
6.0 4.9
7.0 4.5
8.0 7.3
9.0 5.9
10.0 3.8

Figure 2
u v
1.0 7.8
2.0 4.8
3.0 10.3
4.0 5.8
5.0 2.3
6.0 4.5
7.0 9.2
8.0 3.8
9.0 9.2
10.0 6.7

Figure 3
w t
1.0 8.1
2.0 6.7
3.0 7.6
4.0 6.0
5.0 7.1
6.0 4.4
7.0 5.1
8.0 3.2
9.0 4.5
10.0 3.0

Figure 4
m n
1.0 2.5
2.0 4.2
3.0 3.8
4.0 4.8
5.0 4.2
6.0 6.9
7.0 5.7
8.0 8.2
9.0 7.0
10.0 7.9

Answer the following questions about the relationships between pairs of variables and the values of , the sample correlation coefficient. The same response may be the correct answer for more than one question.
1. For which data set is the sample correlation coefficient r closest to -1? ____
a. the x, y data set
b. the u, v data set
c. the w, t data set
d. the m, n data set

2. For which data set is the sample correlation coefficient r closest to 0? ____
a. the x, y data set
b. the u, v data set
c. the w, t data set
d. the m, n data set

3. For which data set is the sample correlation coefficient r equal to 1? ____
a. the x, y data set
b. the u, v data set
c. the w, t data set
d. the m, n data set
e. none of the data sets

4. Which data set indicates the strongest positive linear relationship between its two variables? ___
a. the x, y data set
b. the u, v data set
c. the w, t data set
d. the m, n data set

Attachments
Purchase this Solution

Purchase this Solution


Free BrainMass Quizzes
Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.