Question

a) Construct a frequency distribution where the first class has the limits 0 to <100 b) What is the value of n? The Range? The class width? Calculate the midpoint 4. Fancy Frocks has kept records of the number of dresses it has sold per day DRESSES SOLD 0 <<6 6 <12 12 18 FREQUENCY 2 5 4. a) What is the value of n? The class width? Calculate the midpoint of each class. b) Construct a percentage distribution 5 CENTENNIAL COLLEGE registered the following marks for the Logic test it gives compute TEST MARK 0 1414 FREQUENCY 1 8 7 1912 1216 4 What is the value of n The class with calculate the midpoint of each class

Answer 1

4)a) n=nunber of classes

Here the number of classes = 3

• class width=maximun limit - minimum limit/n

=18-0/3=6

class width =6

• midpoint=(upper limit +lower limit)/2

class1 0-6=0+6/2=3

class 2 6-12=6+12/2=9

class 3 (12-18)=12+18/2=15

b)

0-6	less than 6 but not 0	2	2/11*100=18.18%
6-12	less than 12 but not 6	5	5/11*100=45.45%
12-18	less than 18 but not 12	4	4/11*100=36.36%

5)a)n=number of clases=4

• class width=maximum limit-minimum limit/n

16-0/4=4

• midpoint=upper limit -lower limit/2

class1- 0-4=4+0/2=2

class2=(4-8)=8+4/2=6

class 3=(8-12)=12+8/2=10

class 4(12-16)=16+12/2=14