Students arrive for peer tutoring lab an average of 4.3 students per hour. What is the...

Question

Question

Students arrive for peer tutoring lab an average of 4.3 students per hour. What is the probablitly that less than 2 students will show up in an hour?

A) 0.8385

B) 0.0719

C) 0.9281

D) 0.1615

math Statistics-And-Probability

Answer 1

Answer #1

Ans:

Use Poisson distribution with mean rate=4.3 per hr

P(x=k)=e^-4.3*(4.3^k/k!)

P(x<2)=P(x=0)+P(x=1)

=e^-4.3*(4.3^0/0!+4.3^1/1!)

=e^-4.3*(1+4.3)

=0.0719

Option B is correct.(0.0719)

Answer 2

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