1. Use the given frequency distribution to find the Class Frequency, f a) Class width. 50-52 8 b) Midpoint of the first class. 53-55 15 56 -58 12 c) Class boundaries of the first class. 59 - 61 10 d) Relative frequency of the first class 62 - 64 5 2. For the following data set, 12 9 15 10 15 16 17 18 12 15 20 5 14 a) Find the Mean and the Mode. b) Display the data using a stem-and-leaf plot. c) Find the five number summary. 3. The mean score of a competency test is 82, with a standard deviation of 2. (Assume the data set has a bell-shaped distribution). What percent of the scores lie between 80 and 86. 4. Which data set has the greatest standard deviation. 15 17 (a) (b) (c) 5. A single six-sided die is rolled. Find the probability of rolling a number less than 4. 6. A single card is drawn from a standard deck of 52 cards. What is the probability of drawing a number less than 4? 7. Decide whether the events are independent or dependent. "Selecting a king from a standard deck, replacing it back, and then selecting a queen from the deck"