Chapter 5: Q. 58 (page 351)
Use the following information to answer the next seven exercises. A distribution is given as . What is the cumulative distribution function?
Short Answer
Then answer of cumulative distribution function is
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Chapter 5: Q. 58 (page 351)
Use the following information to answer the next seven exercises. A distribution is given as . What is the cumulative distribution function?
Then answer of cumulative distribution function is
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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. Are the data discrete or continuous?
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.
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 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 type of distribution is this?
Use the following information to answer the next ten questions. The data that follow are the square footage (infeet squared) of homes

The sample mean = and the sample standard deviation = The distribution can be written as
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