Chapter 5: Q.5.9 (page 346)
A continuous probability function is restricted to the portion between x = 0 and 7. What is P(x = 10)?
The value of the iszero.
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Carbon-14 is a radioactive element with a half-life of about
5,730 years. Carbon-14 is said to decay exponentially. The decay rate is 0.000121. We start with one gram of carbon-14.
We are interested in the time (years) it takes to decay carbon-14. What is the decay rate (m)?
The data that follow are the square footage (in 1,000 feet squared) of 28 homes.
The sample mean = 2.50 and the sample standard deviation = 0.8302. The distribution can be written as .
What is ?
Use the following information to answer the next seven exercises. A distribution is given as . Draw the distribution.
What is the median lifetime of these phones (in years)?
a.
b.
c.
d.
A customer service representative must spend different
amounts of time with each customer to resolve various concerns. The amount of time spent with each customer can be
modelled by the following distribution:
Find .
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