BUSINESS ANALYTICS FINAL
EXAM A VARIABLE (1) WITH
ANSWERS WELL RATED A+ 100%
CORRECT
A variable "economic status" with categories low, medium and high is an example of which
type of data?
Correct Answer:
a.
Ordinal data
Question 2
1 out of 1 points
Monthly sales data is an
example of Correct Answer:
c.
time-series data
Question 3
, BUSINESS ANALYTICS FINAL
EXAM A VARIABLE (1) WITH
ANSWERS WELL RATED A+ 100%
CORRECT
1 out of 1 points
The median of a data set with 49 values would be the average of the 24th and the 25th
values when the data values are arranged in ascending order.
Correct Answer:
False Question 4
0 out of 1 points
If we want to examine relationships between two numerical variables, we
can use Correct Answer: b.
scatterplots
, BUSINESS ANALYTICS FINAL
EXAM A VARIABLE (1) WITH
ANSWERS WELL RATED A+ 100%
CORRECT
Question 5
Needs Grading
A sample of 150 students at a State University was taken after the final business statistics
exam to ask them whether they went partying the weekend before the final or spent the
weekend studying, and whether they did well or poorly on the final. The following table
contains the results.
Did Well in Exam Did Poorly in
Exam
Studying for Exam 80 45
Went Partying 32 75
, BUSINESS ANALYTICS FINAL
EXAM A VARIABLE (1) WITH
ANSWERS WELL RATED A+ 100%
CORRECT
Of those in the sample who went partying the weekend before the final exam, what
percentage of them did well in the exam? Is there a relationship between partying/studying
and exam performance?
Correct
Answer
:
32 out of 107, or 29.90%
There seems to be a relationship between partying/studying, since students who
studied are twice as likely to do well than those who partied. The row percentages
are not identical.
Question 6
1 out of 1 points
If P(B) = P(B|A), then events A and B are said
to be Correct Answer: b.
EXAM A VARIABLE (1) WITH
ANSWERS WELL RATED A+ 100%
CORRECT
A variable "economic status" with categories low, medium and high is an example of which
type of data?
Correct Answer:
a.
Ordinal data
Question 2
1 out of 1 points
Monthly sales data is an
example of Correct Answer:
c.
time-series data
Question 3
, BUSINESS ANALYTICS FINAL
EXAM A VARIABLE (1) WITH
ANSWERS WELL RATED A+ 100%
CORRECT
1 out of 1 points
The median of a data set with 49 values would be the average of the 24th and the 25th
values when the data values are arranged in ascending order.
Correct Answer:
False Question 4
0 out of 1 points
If we want to examine relationships between two numerical variables, we
can use Correct Answer: b.
scatterplots
, BUSINESS ANALYTICS FINAL
EXAM A VARIABLE (1) WITH
ANSWERS WELL RATED A+ 100%
CORRECT
Question 5
Needs Grading
A sample of 150 students at a State University was taken after the final business statistics
exam to ask them whether they went partying the weekend before the final or spent the
weekend studying, and whether they did well or poorly on the final. The following table
contains the results.
Did Well in Exam Did Poorly in
Exam
Studying for Exam 80 45
Went Partying 32 75
, BUSINESS ANALYTICS FINAL
EXAM A VARIABLE (1) WITH
ANSWERS WELL RATED A+ 100%
CORRECT
Of those in the sample who went partying the weekend before the final exam, what
percentage of them did well in the exam? Is there a relationship between partying/studying
and exam performance?
Correct
Answer
:
32 out of 107, or 29.90%
There seems to be a relationship between partying/studying, since students who
studied are twice as likely to do well than those who partied. The row percentages
are not identical.
Question 6
1 out of 1 points
If P(B) = P(B|A), then events A and B are said
to be Correct Answer: b.
