A bakery states that 30% of its loaves contain seeds. A consumer group believes that this proportion may be incorrect. A random sample of 40 loaves is taken, and X X\,X denotes the number containing seeds.
State suitable hypotheses.
Find the critical region for a two-tailed test at the 5% level of significance, using a probability of less than 0.025 in each tail.
Find the actual significance level.
The sample contains 18 loaves with seeds. Complete the test.