Question

"The marks scored by 40 candidates in an examination (out of 100) is given below:
75, 65, 57, 50, 32, 54, 75, 67, 75, 88, 80, 42, 40, 41, 34, 78, 43,61, 42, 46, 68, 52, 43, 49, 59, 49, 67, 34, 33, 87, 97, 47, 46, 54,48, 45, 51, 47, 41, 43.
Prepare a frequency distribution table with the class size 10.Take the class intervals as (30-39), (40-49), ... and answer the following questions:(i) Which class intervals have highest and lowest frequency?(ii) Write the upper and lower limits of the class interval 30-39(iii) What is the range of the given distribution?"

Answer 1

From the frequency distribution table

above :

i )Class which have Highest frequency

( 40 - 49 )

Class which have Lowest frequency

( 90 - 99 )

ii ) Class ( 30 - 39 )

Upper limit = 39

Lower limit = 30

iii ) Highest score = 97

Lowest score = 32

Range = Highest score - Lowest score

= 97 - 32

= 65

•••••