Answer:
The 85% confidence interval is (0.2187, 0.2613).
Step-by-step explanation:
We have a large sample of size n = 830 Americans over 45. We have observed that 631 people don't smoke. Let p be the population proportion of Americans over 45 who smoke. An point estimate of p is
and an estimate of the standard deviation of
is
= 0.0148. Therefore, because we have a large sample, the 85% confidence interval for the population proportion is given by
where
is the 7.5th quantile of the standard normal distribution, i.e., -1.4395. Therefore the 85% confidence interval is
or equivalently (0.2187, 0.2613).
Answer:
B. The time when the concert starts.
Step-by-step explanation:
If -5 is five minutes before and 5 is five minutes then 0 would be when it starts.
Rewrite -32 as( -2)^5
5squareroot (-2)^5 Assume positive real numbers
You will get -2
Area of the figure is 171 cm²
See the attachment......