C 784 / C784 Pre-Assessment Review
(Latest Update ) Applied
Healthcare Statistics | Questions
and Answers | Grade A | 100%
Correct - WGU
Question:
Given a linear relationship between two variables, which correlation
coefficient indicates a strong, negative relationship between the two
variables?
a) −0.9564
b) −0.0012
c) −1.537
d) −5.463
Answer:
The correct answer is a. −0.9564 is correct, because it is the closest value to
−1.0 Correlation coefficients are between −1.0and +1.0 so any value less than
−1.0s not a valid correlation coefficient.
,Question:
Which scatterplot shows the strongest positive linear relationship between
the variables?
a) Graph A
b) Graph B
c) Graph C
d) Graph D
Answer:
The correct answer is a. The points are tightly grouped together, indicating a
strong correlation. The points are increasing together, which means the
correlation is positive.
,Question:
Use the table below to answer the following question.
What is the joint frequency of successful gamma knife treatments?
a) 172
b) 239
c) 492
d) 513
Answer:
The correct answer is d. There was a total of 513 successful gamma knife
treatments. The joint frequency for this population is 513
, Question:
Use the table below to answer the following question.
What is the marginal frequency of unsuccessful outcomes?
a) 411
b) 667
c) 752
d) 1008
Answer:
The correct answer is a. There was a total of 411 unsuccessful treatments. The
marginal frequency for this population is 411
(Latest Update ) Applied
Healthcare Statistics | Questions
and Answers | Grade A | 100%
Correct - WGU
Question:
Given a linear relationship between two variables, which correlation
coefficient indicates a strong, negative relationship between the two
variables?
a) −0.9564
b) −0.0012
c) −1.537
d) −5.463
Answer:
The correct answer is a. −0.9564 is correct, because it is the closest value to
−1.0 Correlation coefficients are between −1.0and +1.0 so any value less than
−1.0s not a valid correlation coefficient.
,Question:
Which scatterplot shows the strongest positive linear relationship between
the variables?
a) Graph A
b) Graph B
c) Graph C
d) Graph D
Answer:
The correct answer is a. The points are tightly grouped together, indicating a
strong correlation. The points are increasing together, which means the
correlation is positive.
,Question:
Use the table below to answer the following question.
What is the joint frequency of successful gamma knife treatments?
a) 172
b) 239
c) 492
d) 513
Answer:
The correct answer is d. There was a total of 513 successful gamma knife
treatments. The joint frequency for this population is 513
, Question:
Use the table below to answer the following question.
What is the marginal frequency of unsuccessful outcomes?
a) 411
b) 667
c) 752
d) 1008
Answer:
The correct answer is a. There was a total of 411 unsuccessful treatments. The
marginal frequency for this population is 411
