Show that the probability that more than 8 minutes elapses before ...

[soccerdreamer_17]

Show that the probability that more than 8 minutes elapses before the occurrence of the next event is e-8.
 
  What will be an ideal response?

Question 2

What are the null and alternative hypotheses for the environmental group's test?
 
  A) H0 : P = 0.634 and H1 : P > 0.634
  B) H0 : P = 0.634 and H1 : P  0.634
  C) H0 : P = 0.634 and H1 : P < 0.634
  D) H0 : P > 0.634 and H1 : P  0.634

[macybarnes]

Answer to Question 1

P(X > 8 ) = 1 - P(X  8 ) = 1 - F(8 ) = 1 - 1 - e-8 = e-8

Answer to Question 2

C

[soccerdreamer_17]

Wow, this really help

[ryhom]

Thanks for the timely response, appreciate it