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Dashboard / Courses / UNISA / 2022 / Year / STA1610-22-Y / / Assessment 2
Started on Thursday, 23 June 2022, 11:34 AM
State Finished
Completed on Thursday, 23 June 2022, 11:51 AM
Time taken 16 mins 31 secs
Marks 50.00/50.00
Grade 100.00 out of 100.00
Question 1
Correct
Mark 4.00 out of 4.00
Which one of the following statements is correct with regard to experiments, counting rules and assigning probabilities?
a. An experiment described by a sequence of three steps; with two outcomes possible for each step 1, three outcomes possible for
step 2 and four outcomes possible for step 3, will have a total of 24 experimental outcomes.
b. The number of combinations of five items that can be selected from a group of seven items is 2520.
c. The number of permutations of four items that can be selected from a group of seven items is 21.
d. In an experiment with five equally likely outcomes, each experimental outcome has a probability of 0.25.
e. A classical method of assigning probabilities is appropriate when one cannot assume that the experimental outcomes are equally
likely and when little relevant data is available.
,Question 2
Correct
Mark 2.00 out of 2.00
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Dashboard / Courses / UNISA / 2022 / Year / STA1610-22-Y / / Assessment 2
a.
b.
c.
d.
e.
Question 3
Correct
Mark 4.00 out of 4.00
Consider two events A and B, P(A) = 0.44, P(B) = 0.33 and P(A and B) = 0.00. Which one of the following statements is correct?
a. Events A and B not are mutually exclusive.
b. If Events A and B are independent, then P(A | B) = 0.33.
c. P(A or B) = 0.77.
d. If AC is the compliment of A then, P(AC) = 0.67.
e. If BC is the compliment of B then, P(BC) = 0.56.
Oscar Diura
oscardiura@gmail.com
0844708483
for FAC,MAC,ECS,STA,DSC,QMI,FIN,INV,BNU.MNB tutoring
, Question 4
Correct
Mark 4.00 out of 4.00
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The World Health Organization notes that gender identity is a social construct that varies across culture. The contingency table below show a
Dashboard /of Courses
combination / UNISA
probabilities / 2022
for different / Year
gender / STA1610-22-Y
identities / /group
and how each Assessment
generally2 feel marginalized within their spaces.
Which one of the following statements is correct?
a. Events "Transgender" and "High" are mutually exclusive.
b. Events "Transgender" and "High" are independent of each other.
c. The probability that a randomly selected person identifies as cisgender or feels a low level of being marginalized is 0.86.
d. The probability that a randomly selected person identifies as transgender is 0.04.
e. The probability that a randomly selected person identifies as other is 0.04.
Oscar Diura
oscardiura@gmail.com
0844708483
for FAC,MAC,ECS,STA,DSC,QMI,FIN,INV,BNU.MNB tutoring
