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The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average U.S. driver takes 50,000 trips.
a) What is the probability of a fatal accident over a lifetime? Explain your reasoning carefully. Hint: Assume independent events. Why might the assumption of independence be violated?
b) Why might a driver be tempted not to use a seat belt "just on this trip"?
Their resting heart rates were measured. A partial ANOVA table is given.
At.05 significance level, is there a difference in mean number of calls per day between 2 employees? Compute the p -value?
According to a recent survey, 275 of 400 middle-aged Americans said they used the Internet regularly. 140 of 400 senior citizens said they used the Internet regularly.
Perform hypothesis testing on one variable's data.
Recognize independent variable and dependent variable for this experiment. Think in your head what influences what? Or, what causes what? Cause is independent variable.
The professor wishes to use a random-number table to determine which letter choice should correspond to the correct answer for a question.
At.01 significance level is it sensible to conclude that modification decreased the number of traffic accidents?
To test this notion, eight paid volunteers were placed (individually) in a room in which there was no light from the outside and no clocks or other indications of time.
A review of voter registration records in a small town yielded the following table of the number of males and females registered as Democrat, Republican, or some other affiliation.
Find the probability that at least one subject experiences headaches. Is it unusual to have at least one of six subjects experience headaches?
Identify the independent and dependent variables, and Construct a nominal, ordinal, and interval level measure for each independent and dependent variable.
A random sample of students is selected, and each one is asked to try first brand A and then brand B, or vice versa with the order determined at random.
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