►Try It Yourself 1
Write the claim as a mathematical sentence. State the null and alternative
1. A consumer analyst reports that the mean life of a certain type of
2. An electronics manufacturer publishes that the variance of the life of its
hypotheses, and identify which represents the claim.
automobile battery is not 74 months.
3. A realtor publicizes that the proportion of homeowners who feel their
home theater systems is less than or equal to 2.7.
house is too small for their family is more than 24%.
a. Identify the verbal claim and write it as a mathematical statement.
b. Write the complement of the claim.
c. Identify the null and alternative hypotheses and determine which one
represents the claim.