Answer: 24.9793
Step-by-step explanation:
Given : The director randomly selects 64 different 24-hour periods and determines the number of admissions for each.
For this sample, he calculated a mean and a standard deviation of 100.
The 95% confidence interval results in an interval of
We know that the confidence interval for population mean is given by :_
, where E is the margin of error.
By comparing this to the given interval , we find that the margin of error = 24.9793
Answer:
Sedan: 4 passengers
Minivan: 6 passengers
Step-by-step explanation:
We can write the following system of equations:
, where
represents the number of people a sedan can seat and
represents the number of people a minivan can seat.
Subtracting the first equation from the second, we have:
Now plug in in any of the equations to solve for
:
Verify that the solution pair works:
Therefore, a sedan can hold 4 passengers and a minivan can hold 6 passengers.
Answer: d=12
Step-by-step explanation:
Multiply both parts of the equation by 8:
Divide both parts of the equation by 11: