4. A light bulb manufacturer claims that the mean life of a certain type of light bulb is more than 750 hours. 5. As stated by a company's shipping department, the number of shipping errors per million shipments has a mean of at least 3. Ho: Ha: II. For each of the following, write the 5 steps (listed on the board) necessary to test the claim. LIST ALL VARIABLES ENTERED INTO THE CALCULATOR. Use the P-value method. 1. The U.S. Department of Agriculture claims that the mean cost of raising a child from birth to age 2 is $13,120. A random sample of 500 children (2 years old) has a mean cost of $12,925 with a standard deviation of $1745. At a = 0.10, is there enough evidence to reject the claim