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:
jjj
Step-by-step explanation:jjjj
The answer is A) because the parabola is less than 3 (open circle) and the line is greater than and equal to 3 (closed circle)
Answer:
Step-by-step explanation:
3/4 x 9/4 = 1.6875 or 27/16
Answer:
see below
Step-by-step explanation: 5 19 3 52
BIG square area minus little square area equals the shaded area
big area - little area = shaded area
S² - s² = shaded area
8.5² - 6² = shaded area
72.25 - 36 = ________ units²