2. Some boxes of a certain brand of breakfast cereal include a voucher for a free video rental inside the box. The company that makes the cereal claims that a voucher can be found in 20% of the boxes....

Extracted text: 2. Some boxes of a certain brand of breakfast cereal include a voucher for a free video rental inside the box. The company that makes the cereal claims that a voucher can be found in 20% of the boxes. However, based on their experiences eating this cereal at home, a group of students believe that the proportion of boxes with vouchers is less than 0.2. This group of students purchased 65 boxes of the cereal to investigate the company`s clam. In words: Но: На: In symbols: Ho: На: 3. A pharmacy claims that 9 out of 10 doctors recommend Ibuprofen to combat migraine. To test this claim, a random sample of 400 doctors is obtained so that only 320 of them indicate that they recommend Ibuprofen. In words: Но: На: In symbols: Но: На: 4. A factory, producing mobile chargers, claims that at least 95% of the mobile chargers they produced are not defective. A random sample of 100 mobile chargers were tested and 93 were found to be not defective. In words: Но: На: In symbols: 5. A barangay captain claims that less than 50% of its constituents are dissatisfied with the distribution of relief goods. Test this claim by using the sample data obtained from a survey of 300 families where 54% indicated their dissatisfaction. Ho: На: In words: Ho: На: In symbols: Но: На: