00:01
In this question we have given california people n1 is equal to 3 ,513 and vancouver people is equal and 2 is equal to 3 ,544.
00:10
Now we can write here p1 is equal to p1 becomes 1 165, 17165 preferred coffee with the cream in this question.
00:22
So p1 becomes 171565 divide by 1765 divide by 1765 divide by here.
00:30
Divide by 3 ,513 and it becomes 0 .50.
00:39
Now p2 is equal to the number of vancouver people if total number of vancouver people here is 3 ,544 and the number of 2 ,800's preferred coffee with the cream and it becomes here 0 .79.
01:04
Now we have n1, n2, p1, p2 and we have to here z is equal to, z is equal to we have given 2 .58.
01:15
2 .58 means we can say it's 99 % confidence interval for the difference between the two opinions.
01:25
For two opinions, opinions number one is california's people...