Answer:
Hence, the margin of error is:
1.85 cm to 1.95 cm
Explanation:
It is given that:
Will measured the diameter of a penny as 1.9 cm using the ruler.
" Now we know that the margin of error is a statistic expressing the amount of random sampling error in a survey's results "
It is an amount (usually small) that is allowed for in case of miscalculation or change of circumstances.
So here we have the margin of error to be:
1.85 cm to 1.95 cm
( since the value of change to the left and right of 19 is same and is small (it is 0.05)
i.e. 1.9-0.05=1.85 cm
and 1.9+0.05=1.95 cm ).
Margin of error is: ± 0.05.