Question

The U.S. Postal Service advertises that 63.4% of all third class mail is read by the recipients. An environmental group, concerned about waste production wants to test this assertion. They take a sample of 220 households and find that only 58.7% read their third class mail. Which of the following options best represent the null and alternative hypotheses for the environmental group’s test?

please explain the answer focusing on the alternative hypothesis

Answer 1

Null hypothesis ( H0 ) : The U.S. Postal Service advertises that 63.4% of all third class mail is read by the recipients

i.e.,

H0 : P = 0.634

Alternative hypothesis ( H1) : The U.S. Postal Service does not advertises that 63.4% of all third class mail is read by the recipients i.e.,

H1 : P $\neq$ 0.634