A city wants to know if a new advertising campaign to make citizens aware of the dangers of driving after drinking has been effective. The accompanying table shows the number of drivers who have been stopped with more alcohol in their systems than the law allows for each day of the week in the week before and the week a month after the campaign starts. Assume that the data from each population is Normally distributed. Complete parts a through i below. D. Compute the standard error of the mean difference. E. Find the value of the t-statistic. F. How many degrees of freedom does the t-statistic have?
A city wants to know if a new advertising campaign to make citizens aware of the dangers of driving after drinking has been effective. The accompanying table shows the number of drivers who have been stopped with more alcohol in their systems than the law allows for each day of the week in the week before and the week a month after the campaign starts. Assume that the data from each population is
D. Compute the standard error of the
E. Find the value of the t-statistic.
F. How many degrees of freedom does the t-statistic have?
G. Is the alternative one- or two-sided? Explain.
H. What is the P-value associated with this t-statistic? Assume that the other assumptions and conditions for inference are met.
I) At alpha = 0.10, what do you conclude?
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