Question

(c) what are the class boundaries? complete the table below. temperature (°f) frequency class boundaries 40 - 44 1 45 - 49 3 50 - 54 5 55 - 59 11 60 - 64 7 65 - 69 7 70 - 74 1

Explanation:

Step1: Find lower class boundary

To find the lower class boundary, subtract 0.5 from the lower - class limit.

Step2: Find upper class boundary

To find the upper class boundary, add 0.5 to the upper - class limit.
For the class 40 - 44:
Lower class boundary: $40 - 0.5=39.5$
Upper class boundary: $44 + 0.5 = 44.5$
For the class 45 - 49:
Lower class boundary: $45 - 0.5=44.5$
Upper class boundary: $49 + 0.5 = 49.5$
For the class 50 - 54:
Lower class boundary: $50 - 0.5=54.5$
Upper class boundary: $54 + 0.5 = 54.5$
For the class 55 - 59:
Lower class boundary: $55 - 0.5=54.5$
Upper class boundary: $59 + 0.5 = 59.5$
For the class 60 - 64:
Lower class boundary: $60 - 0.5=59.5$
Upper class boundary: $64 + 0.5 = 64.5$
For the class 65 - 69:
Lower class boundary: $65 - 0.5=64.5$
Upper class boundary: $69 + 0.5 = 69.5$
For the class 70 - 74:
Lower class boundary: $70 - 0.5=69.5$
Upper class boundary: $74 + 0.5 = 74.5$

Answer:

Temperature ($^{\circ}$F)	Frequency	Class boundaries
45 - 49	3	44.5 - 49.5
50 - 54	5	49.5 - 54.5
55 - 59	11	54.5 - 59.5
60 - 64	7	59.5 - 64.5
65 - 69	7	64.5 - 69.5
70 - 74	1	69.5 - 74.5