Chapter 5: Q.5.28 (page 348)
Use the following information to answer the next eight exercises. A distribution is given as .
What is the probability density function?
Short Answer
The probability density function is.
Chapter 5: Q.5.28 (page 348)
Use the following information to answer the next eight exercises. A distribution is given as .
What is the probability density function?
The probability density function is.
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Get started for freeUse the following information to answer the next ten exercises. 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 modeled by the following distribution:
What is the mean?
The age of a first grader on September 1 at Garden Elementary School is uniformly distributed from to years.
We randomly select one first grader from the class.
a. Define the random variable. = _________
b. _________
c. Graph the probability distribution.
d. = _________
e.= _________
f. = _________
g. Find the probability that she is over years old.
h. Find the probability that she is between four and six years old.
i. Find the percentile for the age of first graders on September 1 at Garden Elementary School.
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. Are the data discrete or continuous?
The amount of time a service technician needs to change the oil in a car is uniformly distributed between 11 and 21 minutes. Let X = the time needed to change the oil on a car.
a. Write the random variable X in words. X = __________________.
b. Write the distribution.
c. Graph the distribution.
d. Find P (x > 19).
e. Find the 50th percentile.
Use the following information to answer the next eight exercises. A distribution is given as
. What is b? What does it represent?
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