CNSL503 / CNSL 503 Module 7:
(Latest Update )
Statistics | Questions and Answers |
Grade A | 100% Correct - Portage
Learning
Question:
A ____________ correlation exists between two variables if both variables
increase together.
Answer:
A positive correlation
Question:
A __________________ correlation exists if there is an increase in the
explanatory variable but a decrease in the response variable.
Answer:
negative correlation
,Question:
The terms positive correlation and negative correlation are reserved
for__________________in data and occur when the plotted ordered pairs
approximate a straight line.
Answer:
linear relationships
Question:
____________________ exists when the values of two variables appear to be
related, but the relationship does not follow a linear pattern. For example,
bacterial growth over time exhibits a curvilinear relationship because the
bacteria count increases exponentially, with respect to time.
Answer:
A non-linear or curvilinear relationship
Question:
The degree of a linear relationship is measured by the correlation
coefficient,________ A correlation coefficient, represented by the symbol
_____, is a descriptive statistic that indicates the degree of the relationship or
the consistency of the relationship. Correlation coefficient values range from -
1 to +1,
Answer:
Pearson's r.
r
, Question:
If the data are only collected in the summer or only collected in the winter,
the range is restricted. ___________ results in smaller correlation coefficients
and inaccurate measures of the relationship between two variables.
Answer:
Range restriction
Question:
If a linear relationship exists, the correlation coefficient known as _________
is calculated to determine the degree and the direction of the relationship
between X and Y. ________________ is the sample statistic and ρ(Greek letter
rho) is the population parameter
Answer:
Pearson's r
Question:
The types of hypothesis tests discussed so far, including the z test, t tests,
ANOVA, and Pearson's r, are called
Answer:
parametric tests.
(Latest Update )
Statistics | Questions and Answers |
Grade A | 100% Correct - Portage
Learning
Question:
A ____________ correlation exists between two variables if both variables
increase together.
Answer:
A positive correlation
Question:
A __________________ correlation exists if there is an increase in the
explanatory variable but a decrease in the response variable.
Answer:
negative correlation
,Question:
The terms positive correlation and negative correlation are reserved
for__________________in data and occur when the plotted ordered pairs
approximate a straight line.
Answer:
linear relationships
Question:
____________________ exists when the values of two variables appear to be
related, but the relationship does not follow a linear pattern. For example,
bacterial growth over time exhibits a curvilinear relationship because the
bacteria count increases exponentially, with respect to time.
Answer:
A non-linear or curvilinear relationship
Question:
The degree of a linear relationship is measured by the correlation
coefficient,________ A correlation coefficient, represented by the symbol
_____, is a descriptive statistic that indicates the degree of the relationship or
the consistency of the relationship. Correlation coefficient values range from -
1 to +1,
Answer:
Pearson's r.
r
, Question:
If the data are only collected in the summer or only collected in the winter,
the range is restricted. ___________ results in smaller correlation coefficients
and inaccurate measures of the relationship between two variables.
Answer:
Range restriction
Question:
If a linear relationship exists, the correlation coefficient known as _________
is calculated to determine the degree and the direction of the relationship
between X and Y. ________________ is the sample statistic and ρ(Greek letter
rho) is the population parameter
Answer:
Pearson's r
Question:
The types of hypothesis tests discussed so far, including the z test, t tests,
ANOVA, and Pearson's r, are called
Answer:
parametric tests.
