00:01
So our question says that a malaysian airline wanted to determine if customers would be interested in paying $10 flat fee for unlimited internet access during long haul flight.
00:10
From a random sample of 200 customers, 125 indicated that they would be willing to pay this fee.
00:16
Using this survey data determined in 99 % confidence interval estimates for the population proportion of the airline's customer who will be prepared to pay this fee for internet use.
00:27
So, sample size n is equals to 200 and out of this 200 sample size 125 of them are willing to pay a flat $10 fee for internet access.
00:40
So that means the sample proportion p cap is going to be 125 divided by 200.
00:46
So when we do the math, 125 divided by 200, we have that to be equals to 0 .625.
00:53
So that means q cap is going to be 1 minus 0 .625 and when we do the math, 1 minus 0 .625, that gives us 0 .375.
01:07
So to construct in 99 % confidence interval for the population proportion, we have the formula that says p is equals to p -carp plus or minus the critical value times the square root of p -cap times q -cap divided by n...