A police officer is concerned with excessive speeds on a portion of Interstate 85 with a posted speed limit of 66 miles per hour. Using his radar gun, he records the following speeds for 25 cars and trucks: 68 74 75 84 82 83 81 67 72 73 82 77 77 67 69 69 74 75 75 82 83 80 73 72 Click here for the Excel Data File a. Construct a stem-and-leaf diagram. Stem Leaf
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To find the average speed, we need to add up all the recorded speeds and then divide by the total number of speeds. 68 + 74 + 75 + 84 + 82 + 83 + 81 + 57 + 82 + 72 + 73 + 77 + 77 + 67 + 69 + 69 + 74 + 75 + 75 + 82 + 83 + 80 + 73 + 72 + 72 = 1876 Now, divide the Show more…
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A police officer is concerned with excessive speeds on a portion of Interstate 84 with a posted speed limit of 65 miles per hour. Using his radar gun, he records the following speeds for 25 cars and trucks: Click here for the Excel Data File. Construct a stem-and-leaf diagram. Stem Leaf Are the officer's concerns warranted? Yes
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A police radar unit measured the speed of 25 cars on Elm Street. The resulting speeds were: 29, 23, 30, 30, 27, 24, 30, 25, 23, 28, 25, 24, 28, 30, 23, 30, 27, 25, 29, 24, 23, 26, 30, 28, and 25. a) Create a single distribution table by calculating the relative frequency, cumulative frequency, and cumulative percent. b) Draw a histogram to represent these data. c) Draw a polygon. d) Draw a stem-and-leaf.
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