Find the test statistic
For a certain government agency in a large country, the proportion of fatal traffic accidents in the country in which the driver had a positive blood alcohol concentration (BAC) is 0.39. Suppose a random sample of 104 traffic fatalities in a certain region results in 51 that involved a positive BAC. Does the sample evidence suggest that the region has a higher proportion of traffic fatalities involving a positive BAC than the country at the α=0.1 level of significance?
Because np0(1-p0)=24.7>10, the sample size is less than 5% of the population size, and the sample is given to be random, the requirements for testing the hypothesis are satisfied.
(Round to one decimal place as needed.)
What are the null and alternative hypotheses?
H0: p equals 0.39 versus H1: p greater than 0.39
(Type integers or decimals. Do not round.)
Find the test statistic, z0.
(Round to two decimal places as needed.)