Question

Identify the lower class limits, upper class limits, Blood Platelet Count of class width, class midpoints, and class boundaries for the given frequency distribution. Also identify the number of individuals included in the summary

Identify the lower class limits.

Identify the upper class limits.

Identify the class width. 

Identify the class midpoints.

Identify the class boundaries.

Identify the number of individuals included in the summary.

Answer 1

a) The lower class limits are defined as the starting point of each of the classes given ( that is the first value for each of class):

100,200,300,400,500

b) The upper class limits are the ending values for each of the class ( That is the second value for each of the given class):

199,299,399,499,599

c) The class width is defined as the difference between upper and lower class limit of any of the given classes:

199 - 100 = 99

Therefore 99 is the class width required here.

d) The class midpoints are computed as the middle point of each of the class ( mean of the upper and the lower limit )

(100 + 199)/2 = 149.5

Similarly all the other midpoints are computed to be:

149.5, 249.5, 349.5, 449.5, 549.5

e) The class boundaries are defined as the midpoint of the upper class limit of any class and the lower class limit of the class next to it:

= (199 + 200)/2 = 199.5

Similarly other class boundaries are defined as:

99.5, 199.5, 299.5, 399.5, 499.5, 599.5

f) The total individuals included in the summary is computed as the sum of all frequencies:

= 27 + 95 + 27 + 1 + 3 = 153

Therefore 153 is the total sample size here.