In: Statistics and Probability
A local brewery distributes beer in bottles labeled 24 ounces. A government agency thinks that the brewery is cheating its customers. The agency selects 40 of these bottles, measures their contents, and obtains a sample mean of 23.8 ounces with a standard deviation of 1.1 ounces. Use a 0.01 significance level (α = 0.01) to test the agency's claim that the brewery is cheatings its customers (that the average volume of their beers is less than 24 ounces).
H0:
Ha:
test statistic, z =
critical value =
p-value =
Conclusion: