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Chapter 7: Q.17 (page 428)
Find the probability that the sum of the values is less than 3900.
The probability that the sum of the values is less than isrole="math" localid="1648552619706" .
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In a city, percent of the population favor the incumbent, Dawn Morgan, for mayor. A simple random sample ofis taken. Using the continuity correction factor, find the probability that at least favor Dawn Morgan for mayor.
An unknown distribution has a mean of and a standard deviation of . A sample size of is drawn randomly from the population.
Find the probability that the sum of the values is greater than .
The length of time a particular smartphone's battery lasts follows an exponential distribution with a mean of ten months. A sample of 64 of these smartphones is taken.
What is the distribution for the total length of time 64 batteries last?
A uniform distribution has a minimum of six and a maximum of ten. A sample of is taken.
Find .
Suppose that the duration of a particular type of criminal trial is known to have a mean of days and a standard deviation of seven days. We randomly sample nine trials.
a. In words,
b.
c. Find the probability that the total length of the nine trials is at least days.
d. Ninety percent of the total of nine of these types of trials will last at least how long?
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