Q3 of 52 Page 23

The time taken, in seconds, to solve a problem by each of 25 pupiles is as follows:

16, 20, 26, 27, 28, 30, 33, 37, 38, 40, 42, 43, 46, 46, 46, 48, 49, 50, 53, 58, 59, 60, 64, 52, 20


(a) Construct a frequency distribution for these data, using a class interval of 10 seconds.


(b) Draw a histogram to represent the frequency distribution.































Seconds



Frequency



10-20



1



20-30



5



30-40



4



40-50



8



50-60



5



60-70



2





More from this chapter

All 52 →
1

Construct a histogram for the following data:























Monthly school


Fee (in Rs.)



30-60



60-90



90-120



120-150



150-180



180-210



210-240



No. of schools



5



12



14



18



10



9



4


 2

The distribution of heights (in cm) of 96 children is given below. Construct a histogram and a frequency polygon on the same axes.





























Height (in cm)



124 to 128



128 to 132



132 to 136



136 to 140



140 to 144



144 to 148



148 to 152



152 to 156



156 to 160



160 to 164



No. Of


children



5



8



17



24



16



12



6



4



3



1


 4

Draw, in the same diagram, a histogram and a frequency polygon to represent the following data which shows the monthly cost of living index of a city in a period of 2 years:

























Cost of living index



440-460



460-480



489-500



500-520



520-540



540-560



560-580



580-600



No. of months:



2



4



3



5



3



2



1



4


 5

The following is the distribution of total household expenditure (in Rs.) of manual worker in a city:

























Expenditure (in Rs.)



100-150



150-200



200-250



250-300



300-350



350-400



400-450



450-500



No. of manual worker



25



40



33



28



30



22



16



8



Draw a histogram and a frequency polygon representing the above data.