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Ashworth College | MA260 Statistical Analysis I Exam
Your work has been saved and submitted
Written Dec 4, 2025 12:39 PM - Dec 4, 2025 1:32 PM o Attempt 1 of 2
Attempt Score 100/ 100 - 100 %
Overall Grade (Highest Attempt) 100/ 100 - 100 %
Question 1 5/ 5 points
A survey asked 31,156 homeowners how many pets they owned. The results were as follows:
Number of Pets__ Number of Homeowners
0 6.700
1 9,650
2 8318
3 5.567
4 ormore 921
Total 31,156
What is the probability that a sampled homeowner has more than 1 pet?
® 0475
O 0525
O 0.208
O 0215
Question 2 5/ 5 points
There are 25 students in a sixth-grade class. On a cold winter day in February, many of the students had
runny noses and sore throats. After examining each student, the school nurse constructed the following
table:
Sore No sore
throat throat
Runny nose 3 2
No runny
nose 6 14
Find the probability that a randomly-selected student has a sore throat.
® 036
O 050
O 024
O 020
, 3 Exit Fullscreen
Question 3 5/ 5 points
A 12-sided die can be made from a geometric solid called a
dodecahedron. Assume that a fair dodecahedron is rolled.
The sample
space s {1,2,3,4,5,6,7.8,9, 10, 11,12}
Find P(Less than 4).
O 1/3
® 14
O 1/12
O 7/12
Question 4 5/ 5 points
Nanette must pass through three doors as she walks from her company's foyer to her office. Each of these
doors may be locked or unlocked.
Let Cbe the event that at least two doors are unlocked. List the outcomes of C. [Let "L" designate
"locked" and "U" designate "unlocked"]
O {LLL, LLU, LUL, LUU, ULL, ULU, UUL, UUU}
@® {Uuy, LUU, ULU, UUL}
O {LLU, LUL, ULL, LUV, ULU, UUL}
(O None of these.
Question 5 5/ 5 points
A fair die is rolled two times. What is the probability that both rolls are 3?
O 0.0046
@® 0028
O 0083
O 0167
Question 6 5/ 5 points
The probability that a certain make of car will need repairs in the first six months is 0.4. A dealer sells seven
such cars. What is the probability that at least one of them will require repairs in the first six months?
O 00280
O 09984
@® 09720
O 00016
Ashworth College | MA260 Statistical Analysis I Exam
Your work has been saved and submitted
Written Dec 4, 2025 12:39 PM - Dec 4, 2025 1:32 PM o Attempt 1 of 2
Attempt Score 100/ 100 - 100 %
Overall Grade (Highest Attempt) 100/ 100 - 100 %
Question 1 5/ 5 points
A survey asked 31,156 homeowners how many pets they owned. The results were as follows:
Number of Pets__ Number of Homeowners
0 6.700
1 9,650
2 8318
3 5.567
4 ormore 921
Total 31,156
What is the probability that a sampled homeowner has more than 1 pet?
® 0475
O 0525
O 0.208
O 0215
Question 2 5/ 5 points
There are 25 students in a sixth-grade class. On a cold winter day in February, many of the students had
runny noses and sore throats. After examining each student, the school nurse constructed the following
table:
Sore No sore
throat throat
Runny nose 3 2
No runny
nose 6 14
Find the probability that a randomly-selected student has a sore throat.
® 036
O 050
O 024
O 020
, 3 Exit Fullscreen
Question 3 5/ 5 points
A 12-sided die can be made from a geometric solid called a
dodecahedron. Assume that a fair dodecahedron is rolled.
The sample
space s {1,2,3,4,5,6,7.8,9, 10, 11,12}
Find P(Less than 4).
O 1/3
® 14
O 1/12
O 7/12
Question 4 5/ 5 points
Nanette must pass through three doors as she walks from her company's foyer to her office. Each of these
doors may be locked or unlocked.
Let Cbe the event that at least two doors are unlocked. List the outcomes of C. [Let "L" designate
"locked" and "U" designate "unlocked"]
O {LLL, LLU, LUL, LUU, ULL, ULU, UUL, UUU}
@® {Uuy, LUU, ULU, UUL}
O {LLU, LUL, ULL, LUV, ULU, UUL}
(O None of these.
Question 5 5/ 5 points
A fair die is rolled two times. What is the probability that both rolls are 3?
O 0.0046
@® 0028
O 0083
O 0167
Question 6 5/ 5 points
The probability that a certain make of car will need repairs in the first six months is 0.4. A dealer sells seven
such cars. What is the probability that at least one of them will require repairs in the first six months?
O 00280
O 09984
@® 09720
O 00016
