Lia is comparing her check register to her bank statement, and the ending balances don't seem to match. To check her register fo
2 answers:
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Answer:
a) P(k≤11) = 0.021
b) P(k>23) = 0.213
c) P(11≤k≤23) = 0.777
P(11<k<23) = 0.699
d) P(15<k<25)=0.687
Step-by-step explanation:
a) What is the probability that the number of drivers will be at most 11?
We have to calculate P(k≤11)
b) What is the probability that the number of drivers will exceed 23?
We can write this as:
c) What is the probability that the number of drivers will be between 11 and 23, inclusive? What is the probability that the number of drivers will be strictly between 11 and 23?
Between 11 and 23 inclusive:
Between 11 and 23 exclusive:
d) What is the probability that the number of drivers will be within 2 standard deviations of the mean value?
The standard deviation is
Then, we have to calculate the probability of between 15 and 25 drivers approximately.