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ACTIVITY 5 1. Identify if the situation has a known population variance or unknown population variance and explain why. 1. A population composed of in items whose measurements are 12,! 1.15.3.20.23.18,13,22, and 10. Samples of 6 items are drawn at random without replacement. Answer: Reason: II. Problem-solving 2. According to a study, the average ntnnher of hours of TV viewing per household per week in the Philippines is 50.4 hours and the standard deviation is [1.8 hours. If a random sample of 42 households is taken. what is the probability that-- a. the sample average is more than 52 hours? b. the sample average is less than 4?.5 hours? c. the sample average is less than 40 hours