ECN 221 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: with. How many different homework assignments could I make?
Answer:
3,268,760 It's a big number. Use the N choose r or N choose k formula.
Q: Use the data set which shows student grades and the number of homeworks they
missed. You
Answer:
can use the pivot table feature in Excel to make a crosstabulation or contingency
table as a first
step.
What is the probability of drawing a student who got a "C" in the class. 0.3657
Divide the number of Cs by the total number of grades
0.3657289
, ECN 221 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Use the data set which shows student grades and the number of homeworks they
missed. You
Answer:
can use the pivot table feature in Excel to make a crosstabulation or contingency
table as a first
step.
What is the probability of drawing a student who got an "A" in the class and missed 2
or more
homework assignments. 0.0051
There were 4 out of 782 that got an A and missed 2 or more homework assignments.
0.00511508951
, ECN 221 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Critical Thinking
Answer:
Use the data set which shows student grades and the number of homework
assignments
missed. You can use the pivot table feature in excel to make a crosstabulation or
contingency
table as a first step.
Choose the best statement below.
Passing the class appears to be strongly and negatively related to the number of
missed
homeworks. The probability of not passing the class is fairly low for students that
turn in all
homework assignments, moderate for students that miss one assignment and quite
large for
students that miss more than two assignments.
There appears to be only a weak relationship between the number of missed
assignments and
the grades.
, ECN 221 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Missing a homework assignment is a strong predictor of not getting an exceeds
expectations
Answer:
grade (A or B). For student that miss one homework assignment the probability of
getting an A
or B is extremely small.
The conditional probability of missing at least Passing the class appears to be
strongly and
negatively related to the number of missed homeworks. The probability of not
passing the class
is fairly low for students that turn in all homework assignments, moderate for
students that
miss one assignment and quite large for students that miss more than two
assignments.
The conditional probability of not passing given that a student submitted all
homework is about
.07 and this changes to .15 when missing 1 homework and .26 when missing 2 and
for missing
more than 2 it is silly high. Students that don't do homework are at a dramatically
higher risk of
not passing.
Of students that missed 1 assignment nearly 38% still exceeded expectations. A
probability of
Latest 2026 Update
Q: with. How many different homework assignments could I make?
Answer:
3,268,760 It's a big number. Use the N choose r or N choose k formula.
Q: Use the data set which shows student grades and the number of homeworks they
missed. You
Answer:
can use the pivot table feature in Excel to make a crosstabulation or contingency
table as a first
step.
What is the probability of drawing a student who got a "C" in the class. 0.3657
Divide the number of Cs by the total number of grades
0.3657289
, ECN 221 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Use the data set which shows student grades and the number of homeworks they
missed. You
Answer:
can use the pivot table feature in Excel to make a crosstabulation or contingency
table as a first
step.
What is the probability of drawing a student who got an "A" in the class and missed 2
or more
homework assignments. 0.0051
There were 4 out of 782 that got an A and missed 2 or more homework assignments.
0.00511508951
, ECN 221 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Critical Thinking
Answer:
Use the data set which shows student grades and the number of homework
assignments
missed. You can use the pivot table feature in excel to make a crosstabulation or
contingency
table as a first step.
Choose the best statement below.
Passing the class appears to be strongly and negatively related to the number of
missed
homeworks. The probability of not passing the class is fairly low for students that
turn in all
homework assignments, moderate for students that miss one assignment and quite
large for
students that miss more than two assignments.
There appears to be only a weak relationship between the number of missed
assignments and
the grades.
, ECN 221 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Missing a homework assignment is a strong predictor of not getting an exceeds
expectations
Answer:
grade (A or B). For student that miss one homework assignment the probability of
getting an A
or B is extremely small.
The conditional probability of missing at least Passing the class appears to be
strongly and
negatively related to the number of missed homeworks. The probability of not
passing the class
is fairly low for students that turn in all homework assignments, moderate for
students that
miss one assignment and quite large for students that miss more than two
assignments.
The conditional probability of not passing given that a student submitted all
homework is about
.07 and this changes to .15 when missing 1 homework and .26 when missing 2 and
for missing
more than 2 it is silly high. Students that don't do homework are at a dramatically
higher risk of
not passing.
Of students that missed 1 assignment nearly 38% still exceeded expectations. A
probability of
