Answer:
Class width = 20
Approximate lower class limit of the first class = 110
Approximate Upper class limit of the first class = 119
Step-by-step Explanation:
The class width of the histogram attached below can be gotten by finding the difference between successive lower class limits.
Thus, class width = 130 - 110 = 20
The approximate lower class limit of the first class is the lowest score we have in the first class = 110
The approximate upper class limit of the first class is the closest highest score that fall within the first class and is below the lower limit of the second class. Thus approximate upper class limit of the first class = 129
Answer:
c. histogram.
Step-by-step explanation:
In this case, the most appropiate way to show the results is to group the results in classes (for example from score 0 to 20, 21 to 40, 41 to 60, until 100) and show the relative frequency for each of the classes.
An histogram allows us to present this information graphically in the ways described before.
A pie chart is appropiate to show proportions.
A bar graph is similar but for discrete or non-numerical categories.
A dot plot is adequate por discrete classes and small samples.
You keep the same sign. So:-
4 + 4 = 8 and
--4 + -4 = -8