The Mean Corporation manufactures a line of unassembled furniture. Based on historical evidence, the customer service manager knows that the proportion of customers that have had problems with assembling the furniture at home is 0.30. I Improvements have been made to the instructions provided with the furniture, and the customer service manager believes that this will decrease the proportion of customers that have problems with the fumiture (11:) to below 0.30. A hypothesis tact is conducted in order to nd out. M e an The null and alternative hypotheses are: COT oration H0: TE = 0.30 HR: TI: