1 Downloading times at a website is assumed to be uniformly

1. Downloading times at a website is assumed to be uniformly distributed between 4.5 to 9.5 seconds.

What is the probability that download time will take 9 to 13 seconds?

A. 0.05

B. 0.23

C. 0.10

D. 0.5

2. Product A has sold a mean of 27 items each day with a standard deviation of 5.4. Product B has sold a mean of 35 items with a standard deviation of 6.5. Which product has been more consistent in sales?

A. Sales of Product A has been more consistent

B. Sales of Product B has been more consistent

C. Sales of both products are equally consistent

D. Cannot be determined

Solution

1.

As the distirbution is only from 4.5 to 9.5,

P(9<x<13) = P(9<x<9.5) = (9.5-9)/(9.5-4.5) = 0.1 [ANSWER]

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2.

A. Sales of Product A has been more consistent

[as it has a lesser standard deviation]