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CBSE Class 10 Answered

<div>the following table gives the lifetime of 200 bulbs.Calculate the mean life of a bulb by step deviation method</div> <div>life time [in hrs]: 400-499 &nbsp; &nbsp;500-599 &nbsp; 600-699 &nbsp;700-799 &nbsp; 800-899 &nbsp;900-999</div> <div>frequency: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 24 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;47 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;39 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 42 &nbsp; &nbsp; &nbsp; &nbsp; 34 &nbsp; &nbsp; &nbsp; &nbsp; 14</div> <div>i wanted to check whetjer my answer is correct! pls do it taking values of &nbsp;[A=749.5 and h=200]</div> <div>plssssss do it with my values&nbsp;</div>
Asked by my3shyll | 16 Jul, 2016, 04:24: PM
Expert Answer
 Class size (h)= 100....(Since the class size that is the difference between the upper limit and the lower limit of each class interval is  100)
 Here A = 749.5 and h = 100
 
 
 
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