Posted by dee on Friday, September 23, 2011 at 11:51pm.
Smitty's Bar and Grill has brand name recognition of 61% around the world. Assuming we randomly select 2 people. The assumptions of a Bernoulli process are met. What is the probability
a)exacatly 5 of the 12 recognize the name of Smitty's Bar and Grill?
b)5 or fewer recognize Smitty's Bar and Grill
c)more than 5 recognize Smitty's Bar and Grill?
d) no one in the sample ever heard of Smitty's Bar and Grill

probabilty  Anonymous, Saturday, September 24, 2011 at 6:25am
i think it is b) beacuase thet had only asked 2 people how can they get results by asking two people they have to ask more than 2 people to see.

probabilty  Reiny, Saturday, September 24, 2011 at 8:23am
I have a strong feeling that you have a typo, and that you meant to say,
"Assuming we randomly select 12 people. "
Please confirm.

probabilty  Anonymous, Saturday, September 24, 2011 at 8:32am
if it is 12 people she meant then the answer would be c)

note to "anonymous"  Reiny, Saturday, September 24, 2011 at 8:34am
These are not multiple choice answers, they are individual questions

To dee , probabilty  Reiny, Saturday, September 24, 2011 at 8:40am
a) prob that exactly 5 out of 12 will recognize
= C(12,5)(.61)^5(.39)^7
= appr 0.0918
b)
prob = C(12,0)(.61)^0 (.39)^12 + C(12,1)(.61)^1 (.39)^11 + ... + C(12,5)(.61)^5 (.39)^7
c) prob = 1  (answer to b)
d) prob = C(12,0)(.61)^0 (.39)^12
= .00001238
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