Answer:
24;] ;] ;] ;]
Step-by-step explanation:
from spongebob
The correct answer would be A! (:
Answer:
a) The confidence interval is .
Step-by-step explanation:
We have to calculate a confidence interval (CI) of a difference of proportions.
For the existing procedure, the proportion is:
For the new procedure, the proportion is:
To calculate the CI, we need to estimate the standard deviation
For a 90% CI, the z-value is 1.64.
Then, the CI is:
Answer:
x = 3
Step-by-step explanation:
8z = 2x + 18
6x = 18
x = 3