The following data gives the information on the observed lifetimes (in hours) of 225 electrical components:
Determine the modal lifetimes of the components.
Solution:
Modal class = (60-80) {Because it has highest frequency}
Lower limit of the modal class
Size of the class interval
Frequency of the modal class
Frequency of the class proceeding the modal class
Frequency of the class succeeding the modal class
Mode
Therefore, most components have life of 66.625 hours.
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