and 2 The length of t me n seconds that a userviews a page on a Web site before

Question

and 2 The length of t me n seconds that a userviews a page on a Web site before moving to another age is a lo (a) What is the probability that a page is viewed for more than 10 seconds? (b) By what length of time have 50% of the users moved to another page? norma rando a able with parameters (Round the answer to 4 decimal places.) seconds (Round the answer to 2 decimal places.) (c) What is the mean and standard deviation of the time until a user moves from the page? Mean- Standard deviation- seconds (Round the answer to 2 decimal places.) seconds (Round the answer to 2 decimal places.)

Explanation / Answer

a)

P(X>10)=P(Z>(ln(10)-0.5)/sqrt(1.21))=P(Z>1.64)=0.0505 (please try 0.0506 if this comes wrong)

b)

for 50th percentile corresponding time =e0.5 =1.65 seconds

c)

mean =3.02

std deviation =4.63

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