22. Patients with cancer are divided into two. One group receives 5 milligram of medication that is thought to fight cancer, and the other receives 10 mg. After 2 years the spread of the cancer is measured. This type of statistical study is known as: A) Experimental B) Observational C) Chance D) Probabilistic 22)18. The following frequency distribution presents the frequency of passenger vehicles that pass through a certain intersection from 8:00 AM to 9:00 AM on a particular day. Vehicle Type Frequency Motorcycle 1 l Sedan 60 SUV 80 Truck 39 What is the total frequency of the distribution; and the relative frequency of the SUV category? 18) 190I and 0.421 B) 151 and 80 C) 190 and 80 D) 80 and 0.421 19. Given the following frequency distribution, how many pieces of data were less than 28.5? 19) Class Boundaries Frequencies 13.5-18.5 4 18.5-23.5 9 23.5-23.5 12 28.5-33.5 15 33.533.5 17 A) 25 B) 12 C) 13 D)44 20. State the reason why the following frequency distribution is incorrectly constructed. 20) Class Freguency 45 - 50 3 50 - 55 0 55 - 60 6 60 - 65 5 65 - T0 3 A) class limits overlap B) a class has been omitted C) there is no percent column D) class width is not uniform 21. Descrtptt've statistics consists of collection, organization, summarization and presentation of data. No conclusions are drawn; the data are merely described. A) True B) False 21) 5 A) Household Televisions 14 TITTTTTT Frequency 0 2 Number of TVs B Household Televisions 14 Frequency ONADD GREE Number of TVs C) Household Televisions 15 10 Frequency Number of TVs 16. In a grouped frequency distribution a class is given as 1 1 - 18. Find the class width and the class boundaries respectively. 16) A) 8 and 10.5 - 18.5 B) 7 and 10.5 -18.5 C) 8 and 11.5 -18.5 D) 8 and 11 - 18 17. In a grouped frequency the lower class limit represents the smallest data value that can be included in the class 17) A) True B) False