these are business statistics multiple choice questions. pls help find an expert
ID: 3245704 • Letter: T
Question
these are business statistics multiple choice questions. pls help find an expert in this field to help answer them.
1. A campus program enrols 4 times as many undergraduate students as graduate students (assume that total enrolment is in the thousands). If a random sample of 10 students is selected from the program to be interviewed about the introduction of a new fast food outlet on the ground floor of the campus building, what is the probability that none of the students selected are undergraduate students?
a. 1
b. 0.11
c. 0
Selected: d. 0.4This answer is incorrect.
2.
A packaging company has an old machine which improperly packages 30% of all its goods. The company has a special order to package 20 products for a client. What is the probability that 50% of the order will be improperly packaged?
a. 0.25
Selected: b. 0.5This answer is incorrect.
c. 0.03
d. 0
Question 4
A campus program evenly enrols thousands of undergraduate and graduate students. If a random sample of 4 students is selected from the program to be interviewed about the introduction of a new fast food outlet on the ground floor of the campus building, what is the probability that 2 or 3 of the students selected are undergraduate students?
a. 0.375
b. 0.25
Selected: c. 0.752This answer is incorrect.
d. 0.625
Question 5
A campus program evenly enrols thousands of undergraduate and graduate students. If a random sample of 4 students is selected from the program to be interviewed about the introduction of a new fast food outlet on the ground floor of the campus building, what is the probability that at least 2 of the students selected are undergraduate students?
a. 0.375
b. 0.25
Selected: c. 0.3125This answer is incorrect.
d. 0.6875
Question 6
A packaging company has an old machine which improperly packages 30% of all its goods. The company has a special order to package 20 products for a client. Based on Chebyshev's theorem we can be 89% sure that between ____ and ____ of the products will be improperly packaged.
a. 1,10
b. 3,9
c. 0,12
Selected: d. 2,14This answer is incorrect.
Question 13
The random variable X denotes the number of times students at a certain university visit their Facebook page in a day. The table below gives the probability distribution of X
X
P(X = x)
0
0.001
1
0.08
2
0.03
3
0.25
4
0.209
5
0.4
6
0.03
If a student from the university is randomly selected, what is the probability that he or she visits Facebook at least once per day?
Selected: a. 0.08This answer is incorrect.
b. 2
c. 0.999
d. 0.65
Question 14
Let X represent the number of pets owned by an randomly selected USC student. Two hundred students were randomly sampled and the results below were obtained.
X
P(X)
0
80
1
75
2
40
3
5
What is the probability that a randomly selected student at USC owns at least 1 pet?
a. 0.6
b. 0.4
c. 0.375
Selected: d. 0.75This answer is incorrect.
X
P(X = x)
0
0.001
1
0.08
2
0.03
3
0.25
4
0.209
5
0.4
6
0.03
Explanation / Answer
1 question at a time buddy.
1. So for every 1 graduate there are 4 undergraduate
p of selecting undergraduate is .8
If a random sample of 10,
we have 2 graduate and 8 undergraduates, hence, probability that none of the students selected are undergraduate students = 10C0 (.8^0)(.2^10) = almost 0
C is the right question
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