write difference between??
1) histogram and frequery polygon.
2) inclusive and exclusive classes.
Answers
Answer:
The given distribution is in inclusive form. It should be converted into exclusive form. This can be done by applying a correction factor
2
d
, where
d= (lower limit of class) − (upper limit of a class before it)
Here, we have
actual upper limit =stated limit+
2
d
;
actual lower limit =stated limit−
2
d
.
For example, consider the class limit 10−19. We get
d= lower limit of the class interval − upper limit of class before it =10−9=1.
Hence, d=1 or
2
d
=0.5. Now,
actual upper limit = (state upper limit) +
2
d
=19+0.5=19.5.
actual lower limit = (state lower limit) −
2
d
=10−0.5=9.5
Converting into exclusive form, we get the table as below:
Stated Class interval Actual Class interval Frequency
0−9 −0.5−9.5 5
10−19 9.5−19.5 8
20−29 19.5−29.5 12
30−39 29.5−39.5 18
40−49 39.5−49.5 22
50−59 49.5−59.5 10
Answer:
1)The frequency histogram is like a column graph without the spaces between columns. The frequency polygon is a special line graph used in statistics. These graphs can be drawn separately or combined. The information in a frequency distribution table can be used to draw these graphs.
2)In exclusive form, the lower and upper limits are known as true lower limit and true upper limit of the class interval. Thus, class limits of 10 - 20 class intervals in the exclusive form are 10 and 20. In inclusive form, class limits are obtained by subtracting 0.5 from lower limitand adding 0.5 to the upper limit.
Hope helpful for you