Question

1. The data represent the top speed​ (in mile per​ hour) of all the players​ (except goaltenders) in the 2018 World Cup.

Speed (in MPH)	Frequency
5 to 6.9	54
6 to 7.9	87
9 to 10.9	137
11 to 12.9	171
13 to 14.9	161
15 to 16.9	102

a). Determine the number of classes (Number of class bins)  ,

b). Determine the lower-class limit  , and the upper-class limit  for the fourth class

c). Determine the class width.

Fill the table below. Round only the relative and the cumulative relative frequency to 4 decimals. Extra Credit Construct a relative frequency polygon.

Upper-Class Limits	CLASS-MIDPOINT (X-AXIS)	FREQUENCY	RELATIVE FREQUENCY (Y-AXIS)	CUMULATIVE RELATIVE FREQUENCY
		0	0	0
				1

Answer 1

(a) There are 6 number of classes.

(b) For the fourth class,

  lower-class limit = 11

  upper-class limit = 12.9

(c) class width = upper class limit - upper class limit = 6.9-5 = 1.9