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Avoiding an accident while driving can depend on reaction time. That time, measured from the time the driver first sees the danger until the driver gets his/her foot on the brake pedal, can be described by a normal model with mean 1.6 seconds and standard deviation 0.14 seconds. Use the 68-95-99.7 rule (NOT a z table) to answer the following questions. The pictures of the 68-95-99.7 rule at this link might help.
What percentage of drivers have a reaction time more than 1.88 seconds?
What percentage of drivers have a reaction time less than 1.46 seconds?
What percentage of drivers have a reaction time less than 1.74 seconds?
Find the relative standard distance by assuming that the study area is a rectangle with coordinates of (0,0) in the southwest and (6,6) in the northeast.
COLLEGE ADMISSIONS Applicants who wish to be admitted to a certain professional school in a large university are required to take a screening test.
Under similar driving conditions, they were tested again, using a special additive. The data are shown here. At a = 0.05, did the additive improve gas mileage? Use the Wilcoxon signed-rank test.
What is the probability that a simple random sample of automobile insurance polocies will have a sample mean within 25.
Assume if the students toss the coin 200 times each about 68% should have proportions among what two numbers.
An environmental group is suing a manufacturer because chemicals dumped into a nearby river may be harming fish.- Comment on the statistician's conclusion.
Effective on 80% of women and 65% of men. it is known that 66% of the people who take drug are women. That is the probability that the drug is effective?
A domestic appliance manufacturer is evaluating its delivery system from the production plant to showrooms around the country.
Find the percentage who receive As given that they attend class regularly.- The percentage who receive As given that they do not attend class regularly.
In a graduating class of 753 high school seniors, what is the probability that 15 or more will live beyond their 90th birthday?
Measuring and controlling project deliverables is essential to validating work performed within a project. Evaluate how project status reports are useful for measuring and controlling resource efforts, project schedules, project costs, and project fe..
Find the conditional distributions (percentages) of political views for the males.- Make a graphical display that compares the two distributions.
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