Test the hypothesis of the following situations. Show your complete workings. 1-3) The Head of the P.E. Department of a certain high school claims that the mean height of Grade 7 students is 163 cm. The mean height of 45 randomly selected Grade 7 students is 161 cm. Using 0.01 significance level, can it be concluded that the mean height of Grade 7 students is different from 163 cm as claimed by the Head of the P. E. Department? Step 1 Step 2 Step 3 Step 4 Step 5 Step 69-14) Last year, the mean number of ladies' bags produced by GB Company was 2,500 each day. This year, the manager claims that there is an increase in the number of bags produced. A researcher who wants to find out whether this is true counted the number of bags produced each day for a period of one month. His computation resulted to a mean of 2,515 ladies' bags. At 0.05 significance level, is there enough evidence to conclude that the mean number of ladies' bags produced by GB Company is greater than 2,500? Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 15-20) The manager of a TV Station claims that the mean number of people watching their new sitcom in Manila is 500,000 each day. A student researcher who wants statistical evidence on this claim conducted her own survey. Her survey resulted to a mean of 499,995. Using a 0.05 significance level, can it be concluded that the mean number of people watching the new sitcom is less than 500,000? Step 1 Step 2 Step 3