The following ages (rounded to the nearest whole year) of employees at a large company that were grouped into a distribution with class limits: 20 up to 30
30 up to 40
40 up to 50
50 up to 60
60 up to 70
(i. The class limits for the class 50 up to 60 class are 50 and 58.
(ii. The midpoint for the class 40 up to 50 is 45.
(iii) The class interval is 10.
A) (i), (ii) and (iii) are all correct statements.
B) (i), (ii) and (iii) are all false statements.
C) (i) and (ii) are correct statements but not (iii).
D) (ii) and (iii) are correct statements but not (i).

Question

Quizplus · Accepted Answer

- (i) is incorrect because the class limits for the class 50 up to 60 are 50 and 59, not 58. Class limits define the smallest and largest possible values within a class, and in this case, they are 50 and 59, respectively, for the 50 up to 60 class.- (ii) is correct because the midpoint of a class is calculated by adding the lower class limit to the upper class limit and then dividing by 2. For the 40 up to 50 class, the midpoint is (40 + 50) / 2 = 45.- (iii) is correct because the class interval, also known as class width, is the difference between the lower limit of one class and the lower limit of the next class. In this distribution, the class interval is 10 (e.g., 40 - 30 = 10).

The Following Ages (Rounded to the Nearest Whole Year) of Employees