Step 6
As before, use this table to find the rest of the needed probabilities when n = 15 and p = 0.7. (Round your answers to three decimal places.)
P(5) = 0.003
P(6) = 0.012
P(7) = 0.035
P(8) = 0.081
P(9) = 0.147
Use the probabilities to find the final answer, correct to three decimal places.
P(r5) = P(5) + P(6) + P(7) + P(8) + P(9) = 0.722
1.000
0.999
Step 7
Finally, we will determine the probability that all 15 marketing professionals are extroverts. In other words, we wish to find P(15) when n = 15 and p = 0.7. Note that we already found this value in this table when doing calculations in a previous step. (Round your answer to three decimal places.) P(15) =
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