Respuesta :
Answer and Step-by-step explanation:
The calculation of midpoints, relative frequencies and cumulative frequencies are shown below:-
For Midpoint = [tex]\frac{Lower\ limit\ +\ Upper\ limit}{2}[/tex]
For Relative frequency = [tex]\frac{Frequency}{Total\ number\ of\ frequency}[/tex]
Class     Frequency   Midpoints   Relative    Cumulative
                               frequency   frequency
16​-26        17           21         0.047      0.047
27​-37        45           32        0.123      0.17
38​-48        66          43         0.181       0.351
49​-59        67           54        0.184      0.535
60​-70        82           65        0.225       0.76
71​-81         66          76        0.181       0.941
82​-92        22          87         0.060      1.001
Total         365
Therefore for computing the cumulative frequency we simply added relative frequency with previous cumulative frequency for class 27-37 and in the same manner of every class.
The rate at which something occurs over a particular period of time or in a given sample:
"An increase in the frequency of accidents due to increased overtime"
Given
Use the frequency distribution shown below to construct an expanded frequency distribution.
The formula to calculate the midpoint and relative frequency are given below.
[tex]\rm Midpoint = \dfrac{Lower \ limit + Upper \ limit }{2}[/tex]
[tex]\rm Relative \ frequency = \dfrac{Frequency}{total \ frequency}[/tex]
The frequency distribution to construct an expanded frequency distribution is given below.
Class  Frequency  Midpoints  Relative frequency  Cumulative frequency   Â
16​-26        17           21         0.047      0.047
27​-37        45           32        0.123      0.17
38​-48        66          43         0.181       0.351
49​-59        67           54        0.184      0.535
60​-70        82           65        0.225       0.76
71​-81         66          76        0.181       0.941
82​-92        22          87         0.060      1.001
Total         365
To know more about Frequency click the link given below.
https://brainly.com/question/17740069
