Chapter 12, Problem 9CR

To determine

To graph: the histogram from the given data.

Answer to Problem 9CR

The frequency is maximum at $41-46$ and minimum $47-62$ work out times.

Explanation of Solution

Given:

Work times in minute:

  $41,29,46,39,37,44,33,51,42,30$ .

Concept used:

Class interval should be same or constant.

Frequency can be varied with class interval.

Calculation:

Work times in minute:

  $41,29,46,39,37,44,33,51,42,30$ .

Divide the data into intervals, the minimum is $29$ and the maximum here is $51$ .

Divide the data into $5$ intervals.

Work out time In second	Frequency
$29\text{-}34$	$3$
$35\text{-}40$	$2$
$41\text{-}46$	$4$
$47\text{-52}$	$1$

Draw and label the axes. Draw a bar to represent the frequency of each interval.

  

Hence, frequency is maximum at $41-46$ and minimum $47-62$ .