NEED ANSWER ASAP 6.) 7.) a.) boxes 1, 2,3 4, 5 ANSWER THROUGHLY NOT ATTACHMENT P
ID: 341214 • Letter: N
Question
NEED ANSWER ASAP
6.)
7.)
a.) boxes 1, 2,3 4, 5
ANSWER THROUGHLY
NOT ATTACHMENT PLEASE ANSWER COPY AND PASTE
SOURCE NOT USED BEFORE
A recent survey was conducted of the 25 largest public companies in a particular country. Of these 25 companies, 9 were banking or investment companies based in city X. A total of 11 city X companies were on the top 25 list Suppose we select one of these 25 companies at random. Given that the company is based in city X, what is the probability that it is a banking or investment company?Explanation / Answer
.6) Number of largest public companies surveyed=25
Number of largest public companies in city X=11
Number of banking or investment companies (out of largest public companies) in city X=9
The probability that it is a banking or investment company, given that it is based in city X=9/11
Answer: 9/11
.7) a.
X
1
2
3
4
5
P(X)
0
0.0714
0.1429
0.5612
0.2245
.b.
P(X=3)=
0.1429
.c.P(X< or =2)=P(X=1)+P(X=2)=0+0.0714=0.0714
P(X< =2)=
0.0714
.d. µ =E(X)= Expected value of rating.
This measure gives average rating µ
X
1
2
3
4
5
P(X)
0
0.0714
0.1429
0.5612
0.2245
Total
X*P(X)
0
0.1428
0.4287
2.2448
1.1225
3.9388
SUM (X*P(X))
3.9388
µ=E(X)=
3.9388
X
1
2
3
4
5
P(X)
0
0.0714
0.1429
0.5612
0.2245
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