79/100 is the simplest form
By adding one more person, they each save $8
Total saving = 5 x 8 = 40
So $40 is what the 6th person has to pay.
Therefore the total rent is 6 x 40 = $240.
True mean = mean+/- Z*(SD/sqrt (n))
Where
Z = 1.96 at 95% confidence interval
Mean = 10.3 pounds
SD = standard deviation = 2.4 pounds
n= sample size = 37 packages
Substituting;
True mean range = 10.3+/- 1.96 * 2.4/Sqrt (37) =10.3+/- 0.77 = 9.53<mean<11.07
The answer i believe is 1
