Answer:
The margin of error is
Step-by-step explanation:
From the question we are told that
The number of student is
The highest amount is $200
The lowest amount is $75
The sample mean is &140
The Standard deviation of this set is mathematically evaluated as
Substituting values
The margin of error (ME) is mathematically evaluated as
Where is the critical value for
i.e the significance level
From the critical value table this is
So