A recent study revealed that 60% of employees use their smart phone during work

Question

A recent study revealed that 60% of employees use their smart phone during work hours for non-work related purposes. Suppose you randomly observe employees and record whether the employee is using their phone for non-work related purposes. Let X denote the number of employees that were using their phones. Over the course of one month, the supervisor can observe 200 employees. How many employees that are using their phones for non-work purposes does she observe during a typical month?

a 60 , b 100, c 120, d 150

Explanation / Answer

Here we have proportion of employees use their smart phone during work hours for non-work related purposes,

P=0.60 and total number of employ observe during a typical month is n=200

Hence Expected  employees that are using their phones for non-work purposes she observe during a typical month= n*p= 200*0.60= 120

Correct option (C) 120

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