Thanks for the reply, but I get that part. I was wondering about the values of 0.8779 and -0.5534
I think they are correct for the corresponding probabilities but the answer got different values.
So it's actually the Z1 and Z2 values I need checking. After that, I'm fine.
A high jumper knows from experience that she can clear a height of at least 1.78m once in 5 attempts. She also knows that she can clear a height of at least 1.65m on 7 out of 10 attempts.
Find to 3 dp the mean and standard deviation of the heights the jumper can reach...
Cheers! I know the actualy calculation is done right. Just wasn't completly sure if I'd used the right method.
I stupidly left the notes I did for the question at University and I'm revising now at home so can't check over them.
An experiment consistion of tossing three fair coins is performed repeatedly and "success" is when all three show a head.
What is the probability that the success is on the third performance of the experiment?
Geometric distribution equation