Math Journal Writing 1. A TV manufacturer claims that the life 2 A chemical company alleged that the span of its regular TV sets is longer than average weight of its bag of chemical I years with a standard deviation of 1.5 is 50 kgs. With a standard deviation Of years. Using a random sample of their 16 {1.9 kg. A sample of 29 bags was taken TV sets, the average life span is fnand to and revealed a mean weight of 48.1 be 11.5 veers. Test the hypothesis that has Shall we accept the allegaticrnf the TV sets' life span is longer than 10 the chemical company? Uses; =' {1.01. years at\" == 0.01. - 4. When to use a-test? When to 3. How was your activity\"? What use T-test? could you do to improve your work next time? Describe in one word your experience on this activity. Moth Journal Writing 1. A supermarket owner believes that the mean income of its customers is P50,000 per month. One-hundred customers are randomly selected and asked of their monthly income. The sample mean is P48,500 per month and the standard deviation is P3300. Is there sufficient evidence to indicate that the mean income of the customers of the supermarket is P50,000 per month? Use a m 0.05. 3. How was your activity? What could you do to improve your work next time? Describe in one word your experience on this activity. 2. In a particular community, it is claimed that the mean household water usage for a partiCular month is 48 cubic meters. The following year, a countrywide water conservation campaign was conducted. Form-ve homes were randomly selected and found that the mean commotion is 52 cubic meters with a standard deviation of4 cubic meters. Is there enough evidence to say that the mean household water usage per month is higher than 48 cubic meters at a = 0.01? 4. Differentiate one-tailed test and two tailed test