Question

Match the following sample correlation coefficients with the explanation of what that correlation coefficient means. Type the correct letter in each box.

**1.** ?= −.15

**2.** ?= .92

**3.** ?= −.97

4. r= -1

The regression line is the straight line that bests fits a set
of data points according to what?

**A.** Most accurate regression criterion

**B.** Least-squares criterion.

**C.** Greatest-squares criterion

**D.** None of the above

**4.** ?=−1

**A.** a strong negative relationship between ? and
?

**B.** a weak negative relationship between ? and
?

**C.** a perfect negative relationship between ? and
?

**D.** a strong positive relationship between ? and
?

Answer #1

1) A) If a relationship has a weak, positive, linear
correlation, the correlation coefficient that would be appropriate
is
a) 0.2
c)0.6
b) 0.5
d)0.8
B) Residuals are the
a). horizontal deviations from the line of best fit to each data
point
b). perpendicular distances from the line of best fit to each
data point
c). vertical deviations from the line of best fit to each data
point
d). areas of the squares between the line of best fit and...

4. You have calculated a correlation coefficient r = -0.98 for a
set of data. What does this tell you about the relationship between
the variables? which of the given option is correct
a) Strong, direct correlation
b) Weak, direct correlation
c) Strong, inverse correlation
d) Weak, inverse correlation

Which of the following statements concerning the linear
correlation coefficient are true?
I: If the linear correlation coefficient for two variables is
zero, then there is no relationship between the variables.
II: If the slope of the regression line is negative, then the
linear correlation coefficient less than one.
III: The value of the linear correlation coefficient always lies
between -1 and 1.
IV: A linear correlation coefficient of 0.62 suggests a stronger
linear relationship than a linear correlation coefficient...

Which of the following statements are true of correlation
coefficients?
Group of answer choices
The more negative the number is, the weaker the
relationship.
A correlation coefficient of -0.90 indicates that there is an
inconsistent relationship between the variables.
The closer the coefficient is to 1 or -1, the weaker the
relationship.
A correlation coefficient of 0.05 indicates that there is an
inconsistent relationship between the variables.
Which type of analysis is more flexible than an
independent-samples t-test and allows...

A hypothesis test using a Pearson’s correlation coefficient is
an example of what?
A nonparametric statistic
A descriptive statistic
An inferential statistic
A power statistic
1 points
QUESTION 48
What would the scatter plot show for data that produce a Pearson
correlation of r = +0.88?
Points clustered close to a line that slopes down to the
right
Points clustered close to a line that slopes up to the right
Points widely scattered around a line that slopes up...

The torque. T Nm, required to rotate shafts of different
diameters, D mm, on a machine has been tested and recorded
below.
D (mm)
6
9
17
21
35
42
T (Nm)
4.4
5.9
10.4
12.6
20.3
24.6
a) Use the method of least squares to determine the linear
regression equation that relates the torque to the diameter. Use 3
decimal places for the figures.
b) Using your answer for part a), estimate the value of torque
required when the...

Match the statistics term with its BEST
definition.
Question 2 options:
A key requirement for using correlation and regression models is
to collect this type of data.
With bivariate data, the result of MINIMIZING the sum of squared
distances between the observed and predicted values (residuals) for
a linear model.
This quantity is computed by subtracting the observed response
variable from the predicted response variable.
With bivariate data, when one variable increases a second
variable decrease implies this relationship.
A...

For the following data (a) display the data in a scatter plot,
(b) calculate the correlation coefficient r, and (c) make a
conclusion about the type of correlation.
The ages (in years) of
six
children and the number of words in their vocabulary
Choose the correct scatter plot
(b) The correlation coefficient r is
____
(Round to three decimal places as needed.)
(c) Which of the following best describes the type of
correlation that exists between age and vocabulary size?...

For the following data (a) display the data in a scatter plot,
(b) calculate the correlation coefficient r, and (c) make a
conclusion about the type of correlation.
The ages (in years) of
six
children and the number of words in their vocabulary
Age, x
Vocabulary size, y
1
300
2
700
3
1000
4
1450
5
2100
6
2400
make a scatter plot based on this
(b) The correlation coefficient r is
____?
(Round to three decimal places as...

1)Adding an outlier in a scatterplot will do which of the
following to the correlation coefficient? Explain
a) Increase the correlation coefficient
b) Decrease the correlation coefficient
c) Change the correlation coefficient from positive to
negative
d) Change the correlation coefficient from negative to
positive
e) All options above are possible
2) When the correlation coefficient is close to +1, it
indicates. Please explain
a) changes in one variable cause changes in the other, but we
don't know which one...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 7 minutes ago

asked 10 minutes ago

asked 17 minutes ago

asked 30 minutes ago

asked 35 minutes ago

asked 42 minutes ago

asked 47 minutes ago

asked 47 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago