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Help with Statistic Homework? PLEASE?
A brand name has a 50 percent recognition rate. Assume the owner of the brand wants to verify that rate by beginning with a small sample of 7
b. What is the probability that all of the selected consumers recognize the brand name?
c. What is the probability that at least 6 of the selected consumers recognize the brand name?
Someone please show steps
1 Answer
- DavidLv 75 years agoFavorite Answer
.5^7 =
0.0078125
.78% probability all 7 recognize the brand name
6 or 7 recognize
P(x = 6) = 7C6 * .5^6 * .6
P(x = 6) = 7 * .5^7
P(6 + 7) = 7 * .5^7 + .5^7
P(x >= 6) = .5^7(7 + 1)
P(x >= 6) = 8 * .5^7
0.0625
6.25%
