Question
The brand name of McDonald's has a 95% recognition rate. If a McDonald's executive wants to verify that rate by beginning with a small sample of 15 randomly selected consumers,
find the probability that fewer than 12 of the 15 consumers recognize the McDonald's brand name.
round the answer to three decimal places.
find the probability that fewer than 12 of the 15 consumers recognize the McDonald's brand name.
round the answer to three decimal places.
Answers
R_scott
one minus probability that 12 or more recognize
1 - [.95^15 + (15 * .95^14 * .05) + (105 * .95^13 * .05^2) + ...
... (455 * .95^12 * .05^3)]
1 - [.95^15 + (15 * .95^14 * .05) + (105 * .95^13 * .05^2) + ...
... (455 * .95^12 * .05^3)]