Answer:
b. There is a 95% chance that the true proportion of teenagers who use Mybook as their primary social network site is in the interval (0.2964, 0.9036).
Step-by-step explanation:
Hello!
In general, a 95% confidence interval for the population proportion can be interpreted as: There is a 95% chance (or confidence) that the interval will contain the true value of the proportion.
(Remember the confidence level of 95% means that if you were to make 100 intervals for the population proportion, 95 of them will contain its true value)
The estimated parameter is the population proportion of teenagers that use Mybook as their primary social network site.
With this in mind then you can say that there is a 95% probability that the interval (0.2964, 0.9036) will contain the true value of the proportion of teenagers that use Mybook as their primary social network site.
The correct answer is: b
I hope this helps!
Since the radius is 6 inches, the area is
squared inches.
Now, the full circle is a sector given by a 360° angle. So, the area of a 140° angle will be proportionate:
Solving for 
, we have
In an hour the minute hand goes all the way around, or a 360 loop. so it's its
times the radius squared.
Answer:
There would be around 1.2 × 10⁴ robberies.
Step-by-step explanation:
In the United States, the robbery rate is 202 robberies per 100,000 people. We can use proportions to estimate how many robberies would there be in a state like Indiana, with a population of 5.8 million people.
5.8 × 10⁶ people × (202 robberies / 100,000 people) = 1.2 × 10⁴ robberies
Area of the big circle-area of the small circle is what you are looking for so
Big circle is (3.5)^2pi=12.25pi
Small circle is 4pi
12.25pi-4pi=8.25pi
8.25pi=26
26cm^2
