The wind speeds, x miles per hour (mph), were measured at a coastal location at midday on 40 consecutive days and are presented in the following table.

Abel wishes to calculate an estimate of the mean wind speed in kilometres per hour (km/h). He knows that a distance of 5miles is approximately equal to 8km.

a. Explain how Abel can calculate his estimate without converting the given boundary values from miles per hour to kilometres per hour.

b. Use the wind speeds in mph to estimate the mean wind speed in km/h.

Transcribed Image Text:

Speed (rmph) 15 x<17 17EX< 20 20 sx< 24 24 Ex< 25 No. days (f) 13 14 4