Direction: Just only Identify. the following word problems 1. A manufacturer of ball pens-claims that a certain pen they manufactures has a mean writing life of 400 pages. A purchasing agont selects a sample of 100 pens and puts them for test. The mean writing life from the sample was 390 pages with a standard deviation of 30 at alpha 0.01. 2. The mean weekly sales of soap bars in departmental stores were more than 146.3 bars per store. A sales analyst believes that these said sales to be less. After an advertising campaign the analyst get an average weekly sale in 28 stores for a typical week equivalent to 144.7 and showed a standard deviation of 1?.2. at 0.05 level of signicance. 3. An ambulance service claims that it takes on the average 3.9 minutes to reach its destination in emergency cells. To check on this claim, the agency which licenses ambulance services has them timed on 50 emergency calls, getting a mean of 9.3 minutes with a standard deviation of 1.5 minutes at 0.01 level of significance. 4. An adult organization reported that teenagers spent on average of less than 5.5 hours per week, on the phone. The youth organization thinks that, currently. the mean is higher. With this Fifteen randomly chosen teenagers were asked how many hours per weekthey spend on the phone. The sample mean was 8.?5 hours with a sample standard deviation of 2.0 at 5% level of significance