In 2013, 17% of US adults gave up something for Lent. In 2014, a random sample of 400 people found that 51 people said they would observe Lent. This represents 12.75% of the sample. To test if fewer people observed Lent in 2014, the null hypothesis is that the proportion is equal to 17% and the alternative is that the proportion is less than 17%. The test statistic, p-value, and conclusion are calculated to determine if the sample provides enough evidence to reject the null hypothesis.