Answer:
The correct answer is "(18, 30) minutes".
Step-by-step explanation:
Mean,
= 24
Standard deviation,
= 2
The range of minutes where 99.7% of individuals completed the quiz will be:
= [tex]Mean \pm 3\times Stdev[/tex]
On substituting the values, we get
= [tex]24 \pm 3\times 2[/tex]
= [tex]24 \pm 6[/tex]
now,
= [tex]24-6[/tex]
= [tex]18[/tex]
Or,
= [tex]24+6[/tex]
= [tex]30[/tex]
i.e., 18 to 30 minutes
