The speeds of 55 cars were measured by a radar device on a city street:

a. Classify these data into a grouped frequency distribution by using class boundaries 12€“18, 18€“24, . . . , 48€“54.
b. Find the class width.
c. For the class 24€“30, find the class midpoint, the lower class boundary, and the upper class boundary. d. Construct a frequency histogram of these data.

Transcribed Image Text:

27 23 22 38 43 24 35 26 28 18 20 25 23 22 52 3 30 45 29 27 43 29 28 27 25 29 28 24 37 28 29 18 26 33 25 27 25 34 32 36 22 32 33 21 23 24 8 48 23 16 38 26 21 23