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Chapter 7: Q. 82 (page 434)
82. Would you be surprised, based upon numerical calculations, if the sample average wait time (in minutes) for 100 riders was less than 30 minutes?
a. yes
b. no
c. There is not enough information.
Standard deviation is the statistical term used to find the measurement of a certain group.
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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.
According to the Internal Revenue Service, the average length of time for an individual to complete (keep records for, learn, prepare, copy, assemble, and send) IRS Form is hours (without any attached schedules). The distribution is unknown. Let us assume that the standard deviation is two hours. Suppose we randomly sample taxpayers.
a. In words,
b. In words,
c.
d. Would you be surprised if the taxpayers finished their Form s in an average of more than hours? Explain why or why not in complete sentences.
e. Would you be surprised if one taxpayer finished his or her Form in more than hours? In a complete sentence, explain why.
A manufacturer produces -pound lifting weights. The lowest actual weight is pounds, and the highest is pounds. Each weight is equally likely so the distribution of weights is uniform. A sample of weights is taken.
Draw the graph from Exercise
Based on data from the National Health Survey, women between the ages of and have an average systolic blood pressures (in mm Hg) of with a standard deviation of Systolic blood pressure for women between the ages of to follow a normal distribution.
a. If one woman from this population is randomly selected, find the probability that her systolic blood pressure is greater than .
b. If women from this population are randomly selected, find the probability that their mean systolic blood pressure is greater than .
c. If the sample were four women between the ages of to and we did not know the original distribution, could the central limit theorem be used?
A manufacturer produces 25 -pound lifting weights. The lowest actual weight is 24 pounds, and the highest is 26 pounds. Each weight is equally likely so the distribution of weights is uniform. A sample of 100 weights is taken.
Draw the graph from the exercise.
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